Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2015	Apr. 24, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	LOPE
Entity Registrant Name	GRAND CANYON EDUCATION, INC.
Entity Central Index Key	0001434588
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		47,075,172

Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Net revenue	$ 194,127	$ 167,432
Costs and expenses:
Instructional costs and services	78,687	70,678
Admissions advisory and related, including $505 and $805 to related parties for the three months ended March 31, 2015 and 2014, respectively	28,333	26,261
Advertising	20,031	16,712
Marketing and promotional	1,694	1,791
General and administrative	9,396	8,554
Total costs and expenses	138,141	123,996
Operating income	55,986	43,436
Interest expense	(375)	(523)
Interest and other income	257	137
Income before income taxes	55,868	43,050
Income tax expense	21,689	16,762
Net income	$ 34,179	$ 26,288
Earnings per share:
Basic income per share	$ 0.75	$ 0.58
Diluted income per share	$ 0.72	$ 0.56
Basic weighted average shares outstanding	45,789	45,205
Diluted weighted average shares outstanding	47,201	46,841

Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 34,179	$ 26,288
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of taxes of $3 and $10 for March 31, 2015 and 2014, respectively	5	(16)
Unrealized losses on hedging derivatives, net of taxes of $153 and $17 for March 31, 2015 and 2014, respectively	(239)	(26)
Comprehensive income	$ 33,945	$ 26,246

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

- Definition

Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References+ Details

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities, taxes	$ 3	$ 10
Unrealized losses on hedging derivatives, taxes	$ 153	$ 17

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 86,156	$ 65,238
Restricted cash, cash equivalents and investments	57,875	67,840
Investments	101,015	100,784
Accounts receivable, net	6,689	7,605
Deferred income taxes	6,106	6,149
Other current assets	20,240	19,429
Total current assets	278,081	267,045
Property and equipment, net	527,729	478,170
Prepaid royalties	3,577	3,650
Goodwill	2,941	2,941
Other assets	3,242	3,907
Total assets	815,570	755,713
Current liabilities
Accounts payable	34,316	22,715
Accrued compensation and benefits	18,216	23,995
Accrued liabilities	14,804	13,533
Income taxes payable	15,544	4,906
Student deposits	58,949	69,584
Deferred revenue	53,407	36,868
Due to related parties	420	403
Current portion of capital lease obligations	92	91
Current portion of notes payable	6,618	6,616
Total current liabilities	202,366	178,711
Capital lease obligations, less current portion	383	406
Other noncurrent liabilities	4,245	4,513
Deferred income taxes, noncurrent	17,166	15,974
Notes payable, less current portion	78,221	79,877
Total liabilities	302,381	279,481
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at March 31, 2015 and December 31, 2014
Common stock, $0.01 par value, 100,000 shares authorized; 50,164 and 49,746 shares issued and 47,068 and 46,744 shares outstanding at March 31, 2015 and December 31, 2014, respectively	502	497
Treasury stock, at cost, 3,096 and 3,002 shares of common stock at March 31, 2015 and December 31, 2014, respectively	(57,948)	(53,770)
Additional paid-in capital	165,734	158,549
Accumulated other comprehensive loss	(269)	(35)
Retained earnings	405,170	370,991
Total stockholders' equity	513,189	476,232
Total liabilities and stockholders' equity	$ 815,570	$ 755,713

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	50,164,000	49,746,000
Common stock, shares outstanding	47,068,000	46,744,000
Treasury stock, shares	3,096,000	3,002,000

Consolidated Statement of Stockholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2014	$ 476,232	$ 497	$ (53,770)	$ 158,549	$ (35)	$ 370,991
Beginning Balance, Shares at Dec. 31, 2014		49,746	3,002
Comprehensive income	33,945				(234)	34,179
Restricted shares forfeited	0	0	0	0	0	0
Restricted shares forfeited, Shares			3
Exercise of stock options	1,735	2		1,733
Exercise of stock options, Shares		105
Excess tax benefits	2,870			2,870
Share-based compensation	(1,593)	3	(4,178)	2,582
Share-based compensation, Shares		313	91
Ending Balance at Mar. 31, 2015	$ 513,189	$ 502	$ (57,948)	$ 165,734	$ (269)	$ 405,170
Ending Balance, Shares at Mar. 31, 2015		50,164	3,096

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows provided by operating activities:
Net income	$ 34,179	$ 26,288
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	2,603	2,204
Excess tax benefits from share-based compensation	(2,816)	(6,419)
Provision for bad debts	3,968	3,795
Depreciation and amortization	8,154	6,929
Deferred income taxes	1,001	1,150
Prepaid royalty impairment		966
Other		121
Changes in assets and liabilities:
Restricted cash, cash equivalents and investments	9,965	13,534
Accounts receivable	(3,052)	(3,962)
Prepaid expenses and other	(283)	957
Due to/from related parties	17	62
Accounts payable	(165)	(1,702)
Accrued liabilities and employee related liabilities	(4,526)	(6,419)
Income taxes receivable/payable	13,508	15,104
Deferred rent	(268)	(260)
Deferred revenue	16,539	13,884
Student deposits	(10,635)	(12,561)
Net cash provided by operating activities	68,189	53,671
Cash flows used in investing activities:
Capital expenditures	(45,737)	(27,214)
Purchases of investments	(10,710)	(62,711)
Proceeds from sale or maturity of investments	10,479	13,665
Net cash used in investing activities	(45,968)	(76,260)
Cash flows (used in) provided by financing activities:
Principal payments on notes payable and capital lease obligations	(1,676)	(1,672)
Repurchase of common shares including shares withheld in lieu of income taxes	(4,178)	(4,243)
Excess tax benefits from share-based compensation	2,816	6,419
Net proceeds from exercise of stock options	1,735	5,390
Net cash (used in) provided by financing activities	(1,303)	5,894
Net increase (decrease) in cash and cash equivalents	20,918	(16,695)
Cash and cash equivalents, beginning of period	65,238	55,824
Cash and cash equivalents, end of period	86,156	39,129
Supplemental disclosure of cash flow information
Cash paid for interest	386	535
Cash paid for income taxes	6,800	372
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment included in accounts payable	17,611	5,438
Tax benefit of Spirit warrant intangible	65	65
Shortfall tax expense from share-based compensation	$ 11	$ 9

Nature of Business	3 Months Ended
Nature of Business	Mar. 31, 2015
Accounting Policies [Abstract]
Nature of Business	1. Nature of Business Grand Canyon Education, Inc. (together with its subsidiaries, the “University”) is a comprehensive regionally accredited university that offers over 160 graduate and undergraduate degree programs across eight colleges both online and on ground at our 200+ acre campus in Phoenix, Arizona, and at facilities we lease and at facilities owned by third party employers. Our undergraduate programs are designed to be innovative and to meet the future needs of employers, while providing students with the needed critical thinking and effective communication skills developed through a Christian, liberal arts foundation. The University is accredited by The Higher Learning Commission. The University’s wholly-owned subsidiaries are primarily used to facilitate expansion of the University campus.

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies *Principles of Consolidation* The consolidated financial statements include the accounts of the University and its wholly-owned subsidiaries. Intercompany transactions have been eliminated in consolidation. *Unaudited Interim Financial Information* The accompanying unaudited interim consolidated financial statements of the University have been prepared in accordance with U.S. generally accepted accounting principles and pursuant to the rules and regulations of the United States Securities and Exchange Commission and the instructions to Form 10-Q and Article 10, consistent in all material respects with those applied in its financial statements included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2014. They do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. Such interim financial information is unaudited but reflects all adjustments that in the opinion of management are necessary for the fair presentation of the interim periods presented. Interim results are not necessarily indicative of results for a full year. These consolidated financial statements should be read in conjunction with the University’s audited financial statements and footnotes included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2014 from which the December 31, 2014 balance sheet information was derived. *Restricted Cash, Cash Equivalents and Investments* A significant portion of the University’s revenue is received from students who participate in government financial aid and assistance programs. Restricted cash, cash equivalents and investments primarily represent amounts received from the federal and state governments under various student aid grant and loan programs, such as Title IV. The University receives these funds subsequent to the completion of the authorization and disbursement process and holds them for the benefit of the student. The U.S. Department of Education (“Department of Education”) requires Title IV funds collected in advance of student billings to be restricted until the course begins. The University records all of these amounts as a current asset in restricted cash, cash equivalents and investments. The majority of these funds remains as restricted for an average of 60 to 90 days from the date of receipt. *Investments* The University considers its investments in municipal bond, mutual funds and municipal securities as available-for-sale securities. Available-for-sale securities are carried at fair value, determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the assets, with unrealized gains and losses, net of tax, reported as a separate component of other comprehensive income. Unrealized losses considered to be other-than-temporary are recognized currently in earnings. Amortization of premiums, accretion of discounts, interest and dividend income and realized gains and losses are included in interest and other income. *Note Receivable* The University purchased a note receivable from a financial institution at fair market value in the fourth quarter of 2012 for $27,000. The note bore interest at 11%, which represented the 6% rate of the loan plus the 5% default rate. The principal and most of the interest due on the note was paid in March 2013 resulting in the full return on investment of the note receivable and an additional gain in interest income and other income of $2,187 on the loan. However, the borrower has disputed certain amounts remaining due under the note agreement, including default interest in the amount of $432, a late payment penalty in the amount of $1,392, and a statutory trustee’s fee in the amount of $139. The funds disputed by the borrower, plus interest thereon, were deposited into an escrow account with the clerk of the Maricopa County Superior Court pending resolution of the disputed issues. In the third quarter of 2013, the court ruled in favor of the University with respect to the late penalty and default interest accrued thereon. Accordingly, the University recorded interest and other income of $1,459 for the year ended December 31, 2013. The court ordered the late penalty funds and interest thereon to be released to the University on October 28, 2013 unless prior to said date, borrower filed with the court a formal notice of appeal and simultaneously deposited an additional $344 into escrow with the clerk of the court representing continued interest accruing on the late penalty pending an appeal. On October 28, 2013 borrower deposited with the clerk of the court the required cash bond in the amount of $344 and filed its formal notice of appeal. On January 29, 2015, the court ruled in favor of the University with respect to the remaining default interest and interest thereon. The University is waiting for the formal written decision from the Arizona Court of Appeals. *Derivatives and Hedging* Derivative financial instruments are recorded on the balance sheet as assets or liabilities and re-measured at fair value at each reporting date. For derivatives designated as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. Derivative financial instruments enable the University to manage its exposure to interest rate risk. The University does not engage in any derivative instrument trading activity. Credit risk associated with the University’s derivatives is limited to the risk that a derivative counterparty will not perform in accordance with the terms of the contract. Exposure to counterparty credit risk is considered low because these agreements have been entered into with institutions with strong credit ratings, and they are expected to perform fully under the terms of the agreements. On June 30, 2009 and February 27, 2013, respectively, the University entered into an interest rate swap and an interest rate corridor to manage its 30 Day LIBOR interest exposure related to its variable rate debt. The fair values of the interest rate corridor instrument as of March 31, 2015 and December 31, 2014 were $937 and $1,332, respectively, which are included in other assets. The interest rate swap was terminated upon its expiration date in April 2014. The fair values of each derivative instrument were determined using a hypothetical derivative transaction and Level 2 of the hierarchy of valuation inputs. These derivative instruments were originally designated as cash flow hedges of variable rate debt obligations. The adjustment of ($392) and ($43) for the three months ended March 31, 2015 and 2014, respectively, for the effective portion of the gain/(loss) on the derivatives are included as a component of other comprehensive income (loss), net of taxes. The interest rate corridor instrument reduces variable interest rate risk starting March 1, 2013 through December 20, 2019 with a notional amount of $85,000 as of March 31, 2015. The corridor instrument’s terms permits the University to hedge its interest rate risk at several thresholds; the University pays variable interest monthly based on the 30 Day LIBOR rates until that index reaches 1.5%. If 30 Day LIBOR is equal to 1.5% through 3.0%, the University pays 1.5%. If 30 Day LIBOR exceeds 3.0%, the University pays actual 30 Day LIBOR less 1.5%. As of March 31, 2015, no derivative ineffectiveness was identified. Any ineffectiveness in the University’s derivative instrument designated as a hedge is reported in interest expense in the income statement. For the three months ended March 31, 2015 and 2014, $3 of credit risk was recorded in interest expense for the interest rate corridor. At March 31, 2015, the University does not expect to reclassify gains or losses on derivative instruments from accumulated other comprehensive income (loss) into earnings during the next 12 months. *Fair Value of Financial Instruments* As of March 31, 2015, the carrying value of cash and cash equivalents, investments, accounts receivable, account payable and accrued compensation and benefits and accrued liabilities expenses approximate their fair value based on the liquidity or the short-term maturities of these instruments. The carrying value of notes payable approximates fair value as it is based on variable rate index. The carrying value of capital lease obligations approximate fair value based upon market interest rates available to the University for debt of similar risk and maturities. Derivative financial instruments are carried at fair value, determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the asset or liability. The fair value of investments, primarily municipal securities, including municipal bond portfolios were determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the assets. The unit of account used for valuation is the individual underlying security. The municipal securities are comprised of city and county bonds related to schools, water and sewer, utilities, transportation, healthcare and housing. Because these securities are held by the University as investments, assessment of non-performance risk is not applicable as such considerations are only applicable in evaluating the fair value measurements for liabilities. *Revenue Recognition* Net revenues consist primarily of tuition and fees derived from courses taught by the University online, on ground at its 200+ acre campus in Phoenix, Arizona, and at facilities it leases or those of employers, as well as from related educational resources that the University provides to its students, such as access to online materials. Tuition revenue and most fees from related educational resources are recognized pro-rata over the applicable period of instruction, net of scholarships provided by the University. For the three months ended March 31, 2015 and 2014, the University’s revenue was reduced by approximately $46,432 and $37,719, respectively, as a result of scholarships that the University offered to students. The University maintains an institutional tuition refund policy, which provides for all or a portion of tuition to be refunded if a student withdraws during stated refund periods. Certain states in which students reside impose separate, mandatory refund policies, which override the University’s policy to the extent in conflict. If a student withdraws at a time when only a portion, or none, of the tuition is refundable, then in accordance with its revenue recognition policy, the University continues to recognize the tuition that was not refunded pro-rata over the applicable period of instruction. However, for students that have taken out financial aid to pay their tuition and for which a Return to Title IV is required as a result of his or her withdrawal, the University recognizes revenue after a student withdraws only at the time of cash collection. Sales tax collected from students is excluded from net revenues. Collected but unremitted sales tax is included as an accrued liability in the consolidated balance sheets. The University also charges online students an upfront learning management fee, which is deferred and recognized over the average expected term of a student. Costs that are direct and incremental to new online students are also deferred and recognized ratably over the average expected term of a student. Deferred revenue and student deposits in any period represent the excess of tuition, fees, and other student payments received as compared to amounts recognized as revenue on the income statement and are reflected as current liabilities in the accompanying consolidated balance sheet. The University’s educational programs have starting and ending dates that differ from its fiscal quarters. Therefore, at the end of each fiscal quarter, a portion of revenue from these programs is not yet earned. Other revenues may be recognized as sales occur or services are performed. *Allowance for Doubtful Accounts* The University records an allowance for doubtful accounts for estimated losses resulting from the inability, failure or refusal of its students to make required payments, which includes the recovery of financial aid funds advanced to a student for amounts in excess of the student’s cost of tuition and related fees. The University determines the adequacy of its allowance for doubtful accounts based on an analysis of its historical bad debt experience, current economic trends, the aging of the accounts receivable and student status. The University applies reserves to its receivables based upon an estimate of the risk presented by the age of the receivables and student status. The University writes off accounts receivable balances at the earlier of the time the balances were deemed uncollectible, or one year after the revenue is generated. The University accelerates the write off of inactive student accounts such that the accounts are written off by day 150. The University reflects accounts receivable with an offsetting allowance as long as management believes there is a reasonable possibility of collection. Bad debt expense is recorded as an instructional costs and services expense in the consolidated income statement. *Long-Lived Assets (other than goodwill)* The University evaluates the recoverability of our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to undiscounted future net cash flows expected to be generated by the assets. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. *Instructional Costs and Services* Instructional costs and services consist primarily of costs related to the administration and delivery of the University’s educational programs. This expense category includes salaries, benefits and share-based compensation for full-time and adjunct faculty and administrative personnel, information technology costs, bad debt expense, curriculum and new program development costs (which are expensed as incurred) and costs associated with other support groups that provide services directly to the students. This category also includes an allocation of depreciation, amortization, rent, and occupancy costs attributable to the provision of educational services, primarily at the University’s Phoenix, Arizona campus. *Admissions Advisory and Related* Admissions advisory and related expenses include salaries and benefits for admissions advisory personnel and, revenue share expense as well as an allocation of depreciation, amortization, rent and occupancy costs attributable to the admissions advisory personnel. *Advertising* Advertising expenses include brand advertising, marketing leads and other branding activities. Advertising costs are expensed as incurred. *Marketing and Promotional* Marketing and promotional expenses include salaries, benefits and share-based compensation for marketing personnel, and other promotional expenses. This category also includes an allocation of depreciation, amortization, rent, and occupancy costs attributable to marketing and promotional activities. Marketing and promotional costs are expensed as incurred. *General and Administrative* General and administrative expenses include salaries, benefits and share-based compensation of employees engaged in corporate management, finance, human resources, compliance, and other corporate functions. General and administrative expenses also include an allocation of depreciation, amortization, rent, and occupancy costs attributable to the departments providing general and administrative functions. *Commitments and Contingencies* The University accrues for contingent obligations when it is probable that a liability has been incurred and the amount is reasonably estimable. When the University becomes aware of a claim or potential claim, the likelihood of any loss exposure is assessed. If it is probable that a loss will result and the amount of the loss is estimable, the University records a liability for the estimated loss. If the loss is not probable or the amount of the potential loss is not estimable, the University will disclose the claim if the likelihood of a potential loss is reasonably possible and the amount of the potential loss could be material. Estimates that are particularly sensitive to future changes include tax, legal, and other regulatory matters, which are subject to change as events evolve, and as additional information becomes available during the administrative and litigation process. The University expenses legal fees as incurred. *Use of Estimates* The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. *Segment Information* The University operates as a single educational delivery operation using a core infrastructure that serves the curriculum and educational delivery needs of both its ground and online students regardless of geography. The University’s Chief Executive Officer manages the University’s operations as a whole and no expense or operating income information is generated or evaluated on any component level. *Recent Accounting Pronouncements* In May 2014, the Financial Accounting Standards Board (“FASB”) issued “Revenue from Contracts with Customers.” The standard is a comprehensive new revenue recognition model that requires revenue to be recognized in a manner to depict the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. The standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is not permitted. Accordingly, the standard is effective for us on January 1, 2017. The University is currently evaluating the impact that the standard will have on our financial condition, results of operations and disclosures. The University has determined that no other recent accounting pronouncements apply to its operations or would otherwise have a material impact on its financial statements.

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Investments

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Investments

3. Investments

The following is a summary of amounts included in restricted and unrestricted investments as of March 31, 2015 and December 31, 2014. The University sold $9,965 of restricted investments during the three months ended March 31, 2015. The University considered all investments as available for sale.


	As of March 31, 2015
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Municipal securities	$	83,523	$	48	$	(165	)	$	83,406
Municipal bond mutual fund		75,484		—		—			75,484

Total restricted and unrestricted investments	$	159,007	$	48	$	(165	)	$	158,890


	As of December 31, 2014
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Municipal securities	$	83,364	$	51	$	(177	)	$	83,238
Municipal bond mutual fund		85,386		—		—			85,386

Total unrestricted investments	$	168,750	$	51	$	(177	)	$	168,624

The cash flows of municipal securities are backed by the issuing municipality’s credit worthiness. All municipal securities are due in one year or less as of March 31, 2015. For the three months ended March 31, 2015, the net unrealized loss on available-for-sale securities was $72, net of taxes.

Net Income Per Common Share

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Net Income Per Common Share

4. Net Income Per Common Share

Basic net income per common share is calculated by dividing net income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per common share reflects the assumed conversion of all potentially dilutive securities, consisting of stock options and restricted stock awards, for which the estimated fair value exceeds the exercise price, less shares which could have been purchased with the related proceeds, unless anti-dilutive. For employee equity awards, repurchased shares are also included for any unearned compensation adjusted for tax.

The table below reflects the calculation of the weighted average number of common shares outstanding, on an as if converted basis, used in computing basic and diluted earnings per common share.


	Three Months Ended March 31,
	2015		2014
Denominator:
Basic weighted average shares outstanding		45,789		45,205
Effect of dilutive stock options and restricted stock		1,412		1,636

Diluted weighted average shares outstanding		47,201		46,841

Diluted weighted average shares outstanding exclude the incremental effect of shares that would be issued upon the assumed exercise of stock options and vesting of restricted stock. For the three months ended March 31, 2015 and 2014, approximately 268 and 0, respectively, of the University’s stock options outstanding were excluded from the calculation of diluted earnings per share as their inclusion would have been anti-dilutive. These options and restricted stock awards could be dilutive in the future.

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Allowance for Doubtful Accounts

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Allowance for Doubtful Accounts

5. Allowance for Doubtful Accounts


	Balance at Beginning of Period		Charged to Expense		Deductions⁽¹⁾			Balance at End of Period
Three months ended March 31, 2015	$	6,472		3,968		(3,492	)	$	6,948
Three months ended March 31, 2014	$	9,678		3,795		(4,973	)	$	8,500

(1)	Deductions represent accounts written off, net of recoveries.

Property and Equipment, net

3 Months Ended

Mar. 31, 2015

Property, Plant and Equipment [Abstract]

Property and Equipment, net

6. Property and Equipment, net

Property and equipment, net consist of the following:


	March 31, 2015			December 31, 2014
Land	$	86,278		$	76,537
Land improvements		9,608			8,800
Buildings		298,450			298,124
Buildings and leasehold improvements		46,147			45,855
Equipment under capital leases		5,310			5,310
Computer equipment		79,275			75,990
Furniture, fixtures and equipment		38,449			38,162
Internally developed software		21,545			20,813
Other		1,099			1,099
Construction in progress		61,921			20,693

		648,082			591,383
Less accumulated depreciation and amortization		(120,353	)		(113,213	)

Property and equipment, net	$	527,729		$	478,170

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Commitments and Contingencies

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

Leases

The University leases certain land, buildings and equipment under non-cancelable operating leases expiring at various dates through 2022. Future minimum lease payments under operating leases due each year are as follows at March 31, 2015:


2015 (remaining nine months)	$	5,167
2016		5,310
2017		3,935
2018		3,432
2019		3,022
Thereafter		4,869

Total minimum payments	$	25,735

Total rent expense and related taxes and operating expenses under operating leases for the three months ended March 31, 2015 and 2014 were $2,176 and $2,090, respectively.

Legal Matters

From time to time, the University is a party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business, some of which are covered by insurance. When the University is aware of a claim or potential claim, it assesses the likelihood of any loss or exposure. If it is probable that a loss will result and the amount of the loss can be reasonably estimated, the University records a liability for the loss. If the loss is not probable or the amount of the loss cannot be reasonably estimated, the University discloses the nature of the specific claim if the likelihood of a potential loss is reasonably possible and the amount involved could be material. With respect to the majority of pending litigation matters, the University’s ultimate legal and financial responsibility, if any, cannot be estimated with certainty and, in most cases, any potential losses related to those matters are not considered probable.

Upon resolution of any pending legal matters, the University may incur charges in excess of presently established reserves. Management does not believe that any such charges would, individually or in the aggregate, have a material adverse effect on the University’s financial condition, results of operations or cash flows.

Tax Reserves, Non-Income Tax Related

From time to time the University has exposure to various non-income tax related matters that arise in the ordinary course of business. At March 31, 2015 and December 31, 2014, the University reserved approximately $652 and $659, respectively, for tax matters where its ultimate exposure is considered probable and the potential loss can be reasonably estimated.

- Definition

The entire disclosure for commitments and contingencies.

+ References+ Details

Share-Based Compensation

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

8. Share-Based Compensation

Incentive Plan

Restricted Stock

During the three months ended March 31, 2015, the University granted 313 shares of common stock with a service vesting condition to certain of its executives, officers, faculty and employees. The restricted shares have voting rights and vest in five annual installments of 20% starting on March 1, 2016 and each of the four anniversaries of the vesting date following the date of grant. Upon vesting, shares will be held in lieu of taxes equivalent to the minimum statutory tax withholding required to be paid when the restricted stock vests. During the three months ended March 31, 2015, the University withheld 91 shares of common stock in lieu of taxes at a cost of $4,178 on the restricted stock vesting dates.

A summary of the activity related to restricted stock granted under the University’s Incentive Plan since December 31, 2014 is as follows:


	Total Shares			Weighted Average Grant Date Fair Value per Share
Outstanding as of December 31, 2014		1,033		$	28.75
Granted		313		$	45.75
Vested		(257	)	$	26.47
Forfeited, canceled or expired		(3	)	$	25.82

Outstanding as of March 31, 2015		1,086		$	34.19

Stock Options

During the three months ended March 31, 2015, no options were granted. A summary of the activity related to stock options granted under the University’s Incentive Plan since December 31, 2014 is as follows:


	Summary of Stock Options Outstanding
	Total Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($)(1)
Outstanding as of December 31, 2014		2,452		$	14.83
Granted		—		$	—
Exercised		(105	)	$	16.57
Forfeited, canceled or expired		(3	)	$	16.90

Outstanding as of March 31, 2015		2,344		$	14.75		4.60	$	66,930

Exercisable as of March 31, 2015		2,116		$	14.58		4.45	$	60,783

Available for issuance as of March 31, 2015		1,927

(1)	Aggregate intrinsic value represents the value of the University’s closing stock price on March 31, 2015 ($43.30) in excess of the exercise price multiplied by the number of shares underlying options outstanding or exercisable, as applicable.

Share-based Compensation Expense

The table below outlines share-based compensation expense for the three months ended March 31, 2015 and 2014 related to restricted stock and stock options granted:


	2015			2014
Instructional costs and services	$	1,549		$	1,312
Admissions advisory and related expenses		44			37
Marketing and promotional		46			60
General and administrative		964			795

Share-based compensation expense included in operating expenses		2,603			2,204
Tax effect of share-based compensation		(1,041	)		(882	)

Share-based compensation expense, net of tax	$	1,562		$	1,322

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Regulatory	3 Months Ended
Regulatory	Mar. 31, 2015
Text Block [Abstract]
Regulatory	9. Regulatory The University is subject to extensive regulation by federal and state governmental agencies and accrediting bodies. In particular, the Higher Education Act of 1965, as amended (the “Higher Education Act”), and the regulations promulgated thereunder by the Department of Education, subject the University to significant regulatory scrutiny on the basis of numerous standards that schools must satisfy in order to participate in the various federal student financial assistance programs under Title IV of the Higher Education Act. To participate in the Title IV programs, an institution must be authorized to offer its programs of instruction by the relevant agency of the state in which it is located, accredited by an accrediting agency recognized by the Department of Education and certified as eligible by the Department of Education. The Department of Education will certify an institution to participate in the Title IV programs only after the institution has demonstrated compliance with the Higher Education Act and the Department of Education’s extensive regulations regarding institutional eligibility. An institution must also demonstrate its compliance to the Department of Education on an ongoing basis. As of March 31, 2015, management believes the University is in compliance with the applicable regulations in all material respects. Because the University operates in a highly regulated industry, it, like other industry participants, may be subject from time to time to investigations, claims of non-compliance, or lawsuits by governmental agencies or third parties, which allege statutory violations, regulatory infractions, or common law causes of action. While there can be no assurance that regulatory agencies or third parties will not undertake investigations or make claims against the University, or that such claims, if made, will not have a material adverse effect on the University’s business, results of operations or financial condition, management believes the University is in compliance with applicable regulations in all material respects.

Treasury Stock	3 Months Ended
Treasury Stock	Mar. 31, 2015
Equity [Abstract]
Treasury Stock	10. Treasury Stock The Board of Directors has authorized the University to repurchase up to $75,000 in aggregate of common stock, from time to time, depending on market conditions and other considerations. The current expiration date on the repurchase authorization is September 30, 2015. Repurchases occur at the University’s discretion. Repurchases may be made in the open market or in privately negotiated transactions, pursuant to the applicable Securities and Exchange Commission rules. The amount and timing of future share repurchases, if any, will be made as market and business conditions warrant. Since its approval of the share repurchase plan, the University has purchased 2,787 shares of common stock at an aggregate cost of $49,135. During the three months ended March 31, 2015 the University did not repurchase any shares of common stock. At March 31, 2015, there remained $25,865 available under its share repurchase authorization. Shares repurchased in lieu of taxes are not included in the repurchase plan totals as they were approved in conjunction with the restricted share awards.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	*Principles of Consolidation* The consolidated financial statements include the accounts of the University and its wholly-owned subsidiaries. Intercompany transactions have been eliminated in consolidation.
Unaudited Interim Financial Information	*Unaudited Interim Financial Information* The accompanying unaudited interim consolidated financial statements of the University have been prepared in accordance with U.S. generally accepted accounting principles and pursuant to the rules and regulations of the United States Securities and Exchange Commission and the instructions to Form 10-Q and Article 10, consistent in all material respects with those applied in its financial statements included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2014. They do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. Such interim financial information is unaudited but reflects all adjustments that in the opinion of management are necessary for the fair presentation of the interim periods presented. Interim results are not necessarily indicative of results for a full year. These consolidated financial statements should be read in conjunction with the University’s audited financial statements and footnotes included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2014 from which the December 31, 2014 balance sheet information was derived.
Restricted Cash, Cash Equivalents and Investments	*Restricted Cash, Cash Equivalents and Investments* A significant portion of the University’s revenue is received from students who participate in government financial aid and assistance programs. Restricted cash, cash equivalents and investments primarily represent amounts received from the federal and state governments under various student aid grant and loan programs, such as Title IV. The University receives these funds subsequent to the completion of the authorization and disbursement process and holds them for the benefit of the student. The U.S. Department of Education (“Department of Education”) requires Title IV funds collected in advance of student billings to be restricted until the course begins. The University records all of these amounts as a current asset in restricted cash, cash equivalents and investments. The majority of these funds remains as restricted for an average of 60 to 90 days from the date of receipt
Investments	*Investments* The University considers its investments in municipal bond, mutual funds and municipal securities as available-for-sale securities. Available-for-sale securities are carried at fair value, determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the assets, with unrealized gains and losses, net of tax, reported as a separate component of other comprehensive income. Unrealized losses considered to be other-than-temporary are recognized currently in earnings. Amortization of premiums, accretion of discounts, interest and dividend income and realized gains and losses are included in interest and other income.
Note Receivable	*Note Receivable* The University purchased a note receivable from a financial institution at fair market value in the fourth quarter of 2012 for $27,000. The note bore interest at 11%, which represented the 6% rate of the loan plus the 5% default rate. The principal and most of the interest due on the note was paid in March 2013 resulting in the full return on investment of the note receivable and an additional gain in interest income and other income of $2,187 on the loan. However, the borrower has disputed certain amounts remaining due under the note agreement, including default interest in the amount of $432, a late payment penalty in the amount of $1,392, and a statutory trustee’s fee in the amount of $139. The funds disputed by the borrower, plus interest thereon, were deposited into an escrow account with the clerk of the Maricopa County Superior Court pending resolution of the disputed issues. In the third quarter of 2013, the court ruled in favor of the University with respect to the late penalty and default interest accrued thereon. Accordingly, the University recorded interest and other income of $1,459 for the year ended December 31, 2013. The court ordered the late penalty funds and interest thereon to be released to the University on October 28, 2013 unless prior to said date, borrower filed with the court a formal notice of appeal and simultaneously deposited an additional $344 into escrow with the clerk of the court representing continued interest accruing on the late penalty pending an appeal. On October 28, 2013 borrower deposited with the clerk of the court the required cash bond in the amount of $344 and filed its formal notice of appeal. On January 29, 2015, the court ruled in favor of the University with respect to the remaining default interest and interest thereon. The University is waiting for the formal written decision from the Arizona Court of Appeals.
Derivatives and Hedging	*Derivatives and Hedging* Derivative financial instruments are recorded on the balance sheet as assets or liabilities and re-measured at fair value at each reporting date. For derivatives designated as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. Derivative financial instruments enable the University to manage its exposure to interest rate risk. The University does not engage in any derivative instrument trading activity. Credit risk associated with the University’s derivatives is limited to the risk that a derivative counterparty will not perform in accordance with the terms of the contract. Exposure to counterparty credit risk is considered low because these agreements have been entered into with institutions with strong credit ratings, and they are expected to perform fully under the terms of the agreements. On June 30, 2009 and February 27, 2013, respectively, the University entered into an interest rate swap and an interest rate corridor to manage its 30 Day LIBOR interest exposure related to its variable rate debt. The fair values of the interest rate corridor instrument as of March 31, 2015 and December 31, 2014 were $937 and $1,332, respectively, which are included in other assets. The interest rate swap was terminated upon its expiration date in April 2014. The fair values of each derivative instrument were determined using a hypothetical derivative transaction and Level 2 of the hierarchy of valuation inputs. These derivative instruments were originally designated as cash flow hedges of variable rate debt obligations. The adjustment of ($392) and ($43) for the three months ended March 31, 2015 and 2014, respectively, for the effective portion of the gain/(loss) on the derivatives are included as a component of other comprehensive income (loss), net of taxes. The interest rate corridor instrument reduces variable interest rate risk starting March 1, 2013 through December 20, 2019 with a notional amount of $85,000 as of March 31, 2015. The corridor instrument’s terms permits the University to hedge its interest rate risk at several thresholds; the University pays variable interest monthly based on the 30 Day LIBOR rates until that index reaches 1.5%. If 30 Day LIBOR is equal to 1.5% through 3.0%, the University pays 1.5%. If 30 Day LIBOR exceeds 3.0%, the University pays actual 30 Day LIBOR less 1.5%. As of March 31, 2015, no derivative ineffectiveness was identified. Any ineffectiveness in the University’s derivative instrument designated as a hedge is reported in interest expense in the income statement. For the three months ended March 31, 2015 and 2014, $3 of credit risk was recorded in interest expense for the interest rate corridor. At March 31, 2015, the University does not expect to reclassify gains or losses on derivative instruments from accumulated other comprehensive income (loss) into earnings during the next 12 months.
Fair Value of Financial Instruments	*Fair Value of Financial Instruments* As of March 31, 2015, the carrying value of cash and cash equivalents, investments, accounts receivable, account payable and accrued compensation and benefits and accrued liabilities expenses approximate their fair value based on the liquidity or the short-term maturities of these instruments. The carrying value of notes payable approximates fair value as it is based on variable rate index. The carrying value of capital lease obligations approximate fair value based upon market interest rates available to the University for debt of similar risk and maturities. Derivative financial instruments are carried at fair value, determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the asset or liability. The fair value of investments, primarily municipal securities, including municipal bond portfolios were determined using Level 2 of the hierarchy of valuation inputs, with the use of inputs other than quoted prices that are observable for the assets. The unit of account used for valuation is the individual underlying security. The municipal securities are comprised of city and county bonds related to schools, water and sewer, utilities, transportation, healthcare and housing. Because these securities are held by the University as investments, assessment of non-performance risk is not applicable as such considerations are only applicable in evaluating the fair value measurements for liabilities.
Revenue Recognition	*Revenue Recognition* Net revenues consist primarily of tuition and fees derived from courses taught by the University online, on ground at its 200+ acre campus in Phoenix, Arizona, and at facilities it leases or those of employers, as well as from related educational resources that the University provides to its students, such as access to online materials. Tuition revenue and most fees from related educational resources are recognized pro-rata over the applicable period of instruction, net of scholarships provided by the University. For the three months ended March 31, 2015 and 2014, the University’s revenue was reduced by approximately $46,432 and $37,719, respectively, as a result of scholarships that the University offered to students. The University maintains an institutional tuition refund policy, which provides for all or a portion of tuition to be refunded if a student withdraws during stated refund periods. Certain states in which students reside impose separate, mandatory refund policies, which override the University’s policy to the extent in conflict. If a student withdraws at a time when only a portion, or none, of the tuition is refundable, then in accordance with its revenue recognition policy, the University continues to recognize the tuition that was not refunded pro-rata over the applicable period of instruction. However, for students that have taken out financial aid to pay their tuition and for which a Return to Title IV is required as a result of his or her withdrawal, the University recognizes revenue after a student withdraws only at the time of cash collection. Sales tax collected from students is excluded from net revenues. Collected but unremitted sales tax is included as an accrued liability in the consolidated balance sheets. The University also charges online students an upfront learning management fee, which is deferred and recognized over the average expected term of a student. Costs that are direct and incremental to new online students are also deferred and recognized ratably over the average expected term of a student. Deferred revenue and student deposits in any period represent the excess of tuition, fees, and other student payments received as compared to amounts recognized as revenue on the income statement and are reflected as current liabilities in the accompanying consolidated balance sheet. The University’s educational programs have starting and ending dates that differ from its fiscal quarters. Therefore, at the end of each fiscal quarter, a portion of revenue from these programs is not yet earned. Other revenues may be recognized as sales occur or services are performed.
Allowance for Doubtful Accounts	*Allowance for Doubtful Accounts* The University records an allowance for doubtful accounts for estimated losses resulting from the inability, failure or refusal of its students to make required payments, which includes the recovery of financial aid funds advanced to a student for amounts in excess of the student’s cost of tuition and related fees. The University determines the adequacy of its allowance for doubtful accounts based on an analysis of its historical bad debt experience, current economic trends, the aging of the accounts receivable and student status. The University applies reserves to its receivables based upon an estimate of the risk presented by the age of the receivables and student status. The University writes off accounts receivable balances at the earlier of the time the balances were deemed uncollectible, or one year after the revenue is generated. The University accelerates the write off of inactive student accounts such that the accounts are written off by day 150. The University reflects accounts receivable with an offsetting allowance as long as management believes there is a reasonable possibility of collection. Bad debt expense is recorded as an instructional costs and services expense in the consolidated income statement.
Long-Lived Assets (other than goodwill)	*Long-Lived Assets (other than goodwill)* The University evaluates the recoverability of our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to undiscounted future net cash flows expected to be generated by the assets. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.
Instructional Costs and Services	*Instructional Costs and Services* Instructional costs and services consist primarily of costs related to the administration and delivery of the University’s educational programs. This expense category includes salaries, benefits and share-based compensation for full-time and adjunct faculty and administrative personnel, information technology costs, bad debt expense, curriculum and new program development costs (which are expensed as incurred) and costs associated with other support groups that provide services directly to the students. This category also includes an allocation of depreciation, amortization, rent, and occupancy costs attributable to the provision of educational services, primarily at the University’s Phoenix, Arizona campus.
Admissions Advisory and Related	*Admissions Advisory and Related* Admissions advisory and related expenses include salaries and benefits for admissions advisory personnel and, revenue share expense as well as an allocation of depreciation, amortization, rent and occupancy costs attributable to the admissions advisory personnel.
Advertising	*Advertising* Advertising expenses include brand advertising, marketing leads and other branding activities. Advertising costs are expensed as incurred.
Marketing and Promotional	*Marketing and Promotional* Marketing and promotional expenses include salaries, benefits and share-based compensation for marketing personnel, and other promotional expenses. This category also includes an allocation of depreciation, amortization, rent, and occupancy costs attributable to marketing and promotional activities. Marketing and promotional costs are expensed as incurred.
General and Administrative	*General and Administrative* General and administrative expenses include salaries, benefits and share-based compensation of employees engaged in corporate management, finance, human resources, compliance, and other corporate functions. General and administrative expenses also include an allocation of depreciation, amortization, rent, and occupancy costs attributable to the departments providing general and administrative functions.
Commitments and Contingencies	*Commitments and Contingencies* The University accrues for contingent obligations when it is probable that a liability has been incurred and the amount is reasonably estimable. When the University becomes aware of a claim or potential claim, the likelihood of any loss exposure is assessed. If it is probable that a loss will result and the amount of the loss is estimable, the University records a liability for the estimated loss. If the loss is not probable or the amount of the potential loss is not estimable, the University will disclose the claim if the likelihood of a potential loss is reasonably possible and the amount of the potential loss could be material. Estimates that are particularly sensitive to future changes include tax, legal, and other regulatory matters, which are subject to change as events evolve, and as additional information becomes available during the administrative and litigation process. The University expenses legal fees as incurred.
Use of Estimates	*Use of Estimates* The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Segment Information	*Segment Information* The University operates as a single educational delivery operation using a core infrastructure that serves the curriculum and educational delivery needs of both its ground and online students regardless of geography. The University’s Chief Executive Officer manages the University’s operations as a whole and no expense or operating income information is generated or evaluated on any component level.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements* In May 2014, the Financial Accounting Standards Board (“FASB”) issued “Revenue from Contracts with Customers.” The standard is a comprehensive new revenue recognition model that requires revenue to be recognized in a manner to depict the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. The standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is not permitted. Accordingly, the standard is effective for us on January 1, 2017. The University is currently evaluating the impact that the standard will have on our financial condition, results of operations and disclosures. The University has determined that no other recent accounting pronouncements apply to its operations or would otherwise have a material impact on its financial statements.

Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Amounts Included in Restricted Investments and Unrestricted Investments

The following is a summary of amounts included in restricted and unrestricted investments as of March 31, 2015 and December 31, 2014. The University considered all investments as available for sale.


	As of March 31, 2015
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Municipal securities	$	83,523	$	48	$	(165	)	$	83,406
Municipal bond mutual fund		75,484		—		—			75,484

Total restricted and unrestricted investments	$	159,007	$	48	$	(165	)	$	158,890


	As of December 31, 2014
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Municipal securities	$	83,364	$	51	$	(177	)	$	83,238
Municipal bond mutual fund		85,386		—		—			85,386

Total unrestricted investments	$	168,750	$	51	$	(177	)	$	168,624

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details

Net Income Per Common Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Summary of Weighted Average Number of Common Shares Outstanding

The table below reflects the calculation of the weighted average number of common shares outstanding, on an as if converted basis, used in computing basic and diluted earnings per common share.


	Three Months Ended March 31,
	2015		2014
Denominator:
Basic weighted average shares outstanding		45,789		45,205
Effect of dilutive stock options and restricted stock		1,412		1,636

Diluted weighted average shares outstanding		47,201		46,841

Allowance for Doubtful Accounts (Tables)

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Schedule of Allowance for Doubtful Accounts


	Balance at Beginning of Period		Charged to Expense		Deductions⁽¹⁾			Balance at End of Period
Three months ended March 31, 2015	$	6,472		3,968		(3,492	)	$	6,948
Three months ended March 31, 2014	$	9,678		3,795		(4,973	)	$	8,500

(1)	Deductions represent accounts written off, net of recoveries.

Property and Equipment, net (Tables)

3 Months Ended

Mar. 31, 2015

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment, Net

Property and equipment, net consist of the following:


	March 31, 2015			December 31, 2014
Land	$	86,278		$	76,537
Land improvements		9,608			8,800
Buildings		298,450			298,124
Buildings and leasehold improvements		46,147			45,855
Equipment under capital leases		5,310			5,310
Computer equipment		79,275			75,990
Furniture, fixtures and equipment		38,449			38,162
Internally developed software		21,545			20,813
Other		1,099			1,099
Construction in progress		61,921			20,693

		648,082			591,383
Less accumulated depreciation and amortization		(120,353	)		(113,213	)

Property and equipment, net	$	527,729		$	478,170

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments under Operating Leases

Future minimum lease payments under operating leases due each year are as follows at March 31, 2015:


2015 (remaining nine months)	$	5,167
2016		5,310
2017		3,935
2018		3,432
2019		3,022
Thereafter		4,869

Total minimum payments	$	25,735

- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

+ References+ Details

Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Activity Related to Restricted Stock Granted under Incentive Plan

A summary of the activity related to restricted stock granted under the University’s Incentive Plan since December 31, 2014 is as follows:


	Total Shares			Weighted Average Grant Date Fair Value per Share
Outstanding as of December 31, 2014		1,033		$	28.75
Granted		313		$	45.75
Vested		(257	)	$	26.47
Forfeited, canceled or expired		(3	)	$	25.82

Outstanding as of March 31, 2015		1,086		$	34.19

Summary of Activity Related to Stock Options Granted under Company's Incentive Plan

A summary of the activity related to stock options granted under the University’s Incentive Plan since December 31, 2014 is as follows:


	Summary of Stock Options Outstanding
	Total Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($)(1)
Outstanding as of December 31, 2014		2,452		$	14.83
Granted		—		$	—
Exercised		(105	)	$	16.57
Forfeited, canceled or expired		(3	)	$	16.90

Outstanding as of March 31, 2015		2,344		$	14.75		4.60	$	66,930

Exercisable as of March 31, 2015		2,116		$	14.58		4.45	$	60,783

Available for issuance as of March 31, 2015		1,927

(1)	Aggregate intrinsic value represents the value of the University’s closing stock price on March 31, 2015 ($43.30) in excess of the exercise price multiplied by the number of shares underlying options outstanding or exercisable, as applicable.

Share-Based Compensation Expense

The table below outlines share-based compensation expense for the three months ended March 31, 2015 and 2014 related to restricted stock and stock options granted:


	2015			2014
Instructional costs and services	$	1,549		$	1,312
Admissions advisory and related expenses		44			37
Marketing and promotional		46			60
General and administrative		964			795

Share-based compensation expense included in operating expenses		2,603			2,204
Tax effect of share-based compensation		(1,041	)		(882	)

Share-based compensation expense, net of tax	$	1,562		$	1,322

Nature of Business - Additional Information (Detail)	3 Months Ended
Nature of Business - Additional Information (Detail)	Mar. 31, 2015 Degrees Colleges
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of area of the company's campus in Phoenix, Arizona	200+ acre campus
Number of colleges in Phoenix, Arizona	8
Number of degree programs offered in Phoenix, Arizona and online	160

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended		3 Months Ended						3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2015 Interest Rate Corridor [Member]	Mar. 31, 2014 Interest Rate Corridor [Member]	Mar. 31, 2015 Cash Flow Hedging [Member]	Mar. 31, 2014 Cash Flow Hedging [Member]	Mar. 31, 2015 Other Assets [Member]	Dec. 31, 2014 Other Assets [Member]	Mar. 31, 2015 Minimum [Member]	Mar. 31, 2015 Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Average days from the date of receipt in which funds remain as restricted cash and cash equivalents	60 to 90 days
Number of days from the date of receipt in which funds remain as restricted cash and cash equivalents											60 days	90 days
Note receivable from a financial institution at fair market value				$ 27,000,000
Interest rate on notes	11.00%
Interest rate on loan	6.00%
Default rate	5.00%
Interest income and other income on the loan	2,187,000		1,459,000
Default interest amount	432,000
Late payment penalty amount	1,392,000
Statutory trustee's fee amount	139,000
Additional amount deposited in escrow	344,000
Date of order for late penalty funds	Oct. 28, 2013
Period of LIBOR interest rate	30 days
Fair values of interest rate corridor instrument									937,000	1,332,000
Effective portion of gain/loss on derivatives included as a component of other comprehensive income, net of taxes	(239,000)	(26,000)					(392,000)	(43,000)
Notional amount of derivative instrument					85,000,000
Description of interest rate risk hedge at several thresholds					The University pays variable interest monthly based on the 30 Day LIBOR rates until that index reaches 1.5%. If 30 Day LIBOR is equal to 1.5% through 3.0%, the University pays 1.5%. If 30 Day LIBOR exceeds 3.0%, the University pays actual 30 Day LIBOR less 1.5%.
Maximum percentage of variable interest rates based on LIBOR					1.50%
Debt instrument, description of variable rate basis					LIBOR
Percentage of amount paid by University					1.50%
Minimum percentage of LIBOR					1.50%
Maximum percentage of LIBOR					3.00%
Percentage deducted from LIBOR for actual payment					1.50%
Interest expense on derivatives related to credit risk					3,000	3,000
Description of area of the company's campus in Phoenix, Arizona	200+ acre campus
Reduction in revenue due to scholarships offered to students	$ 46,432,000	$ 37,719,000
Period for write off of inactive student accounts	150 days

Investments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amount of restricted investments sold	$ 9,965
Unrealized net (losses) gains on available-for-sale securities	$ (72)
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturity period of investments	One year or less

Investments - Summary of Amounts Included in Restricted Investments and Unrestricted Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 159,007	$ 168,750
Gross Unrealized Gains	48	51
Gross Unrealized (Losses)	(165)	(177)
Estimated Fair Value	158,890	168,624
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	83,523	83,364
Gross Unrealized Gains	48	51
Gross Unrealized (Losses)	(165)	(177)
Estimated Fair Value	83,406	83,238
Municipal Bond Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	75,484	85,386
Estimated Fair Value	$ 75,484	$ 85,386

Net Income Per Common Share - Summary of Weighted Average Number of Common Shares Outstanding (Detail) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Denominator:
Basic weighted average shares outstanding	45,789	45,205
Effect of dilutive stock options and restricted stock	1,412	1,636
Diluted weighted average shares outstanding	47,201	46,841

Net Income Per Common Share - Additional Information (Detail) (Stock Option And Restricted Stock Awards [Member]) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stock Option And Restricted Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
University's stock options and restricted stock awards outstanding were excluded from the calculation of diluted earnings	268	0

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details

Allowance for Doubtful Accounts - Schedule of Allowance for Doubtful Accounts (Detail) (Allowance for Doubtful Accounts Receivable [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Allowance for Doubtful Accounts Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	$ 6,472	$ 9,678
Charged to Expense	3,968	3,795
Deductions	(3,492)	(4,973)
Balance at End of Period	$ 6,948	$ 8,500

Property and Equipment, net - Summary of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 648,082	$ 591,383
Less accumulated depreciation and amortization	(120,353)	(113,213)
Property and equipment, net	527,729	478,170
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	86,278	76,537
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	9,608	8,800
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	298,450	298,124
Buildings and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	46,147	45,855
Equipment under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	5,310	5,310
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	79,275	75,990
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	38,449	38,162
Internally Developed Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	21,545	20,813
Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,099	1,099
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 61,921	$ 20,693

Commitments and Contingencies - Future Minimum Lease Payments under Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
2015 (remaining nine months)	$ 5,167
2016	5,310
2017	3,935
2018	3,432
2019	3,022
Thereafter	4,869
Total minimum payments	$ 25,735

Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Total rent expense and related taxes and operating expenses, under operating leases	$ 2,176	$ 2,090
Tax reserves, non-income tax related	$ 652		$ 659

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Share-Based Compensation - Additional Information (Detail) (Restricted Stock Grants [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Anniversaries
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	313
Number of anniversaries of the vesting date following the date of grant	4
Shares withheld for taxes	91
Common stock in lieu of taxes	$ 4,178
Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	313
Percentage of shares to vest each year	20.00%
Vesting period	5 years

Share-Based Compensation - Summary of Activity Related to Restricted Stock Granted under Incentive Plan (Detail) (Restricted Stock Grants [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Restricted Stock Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Shares, Outstanding, Beginning Balance	1,033
Total Shares, Granted	313
Total Shares, Vested	(257)
Total Shares, Forfeited, canceled or expired	(3)
Total Shares, Outstanding, Ending Balance	1,086
Weighted Average Grant Date Fair Value, Beginning Balance	$ 28.75
Weighted Average Grant Date Fair Value, Granted	$ 45.75
Weighted Average Grant Date Fair Value, Vested	$ 26.47
Weighted Average Grant Date Fair Value, Forfeited, cancelled or expired	$ 25.82
Weighted Average Grant Date Fair Value, Ending Balance	$ 34.19

Share-Based Compensation - Summary of Activity Related to Stock Options Granted under Company's Incentive Plan (Detail) (Employee Stock Option [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Shares outstanding, Beginning balance	2,452
Total Shares, Granted	0
Total Shares, Exercised	(105)
Total Shares, Forfeited, canceled or expired	(3)
Total Shares outstanding, Ending balance	2,344
Total Shares, Exercisable	2,116
Total Shares, Available for issuance	1,927
Weighted Average Exercise Price per Share Outstanding, Beginning balance	$ 14.83
Weighted Average Exercise Price per Share, Granted	$ 0
Weighted Average Exercise Price per Share, Exercised	$ 16.57
Weighted Average Exercise Price per Share, Forfeited, canceled or expired	$ 16.90
Weighted Average Exercise Price per Share Outstanding, Ending balance	$ 14.75
Weighted Average Exercise Price per Share, Exercisable	$ 14.58
Weighted Average Remaining Contractual Term (Years), Outstanding	4 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Exercisable	4 years 5 months 12 days
Aggregate Intrinsic Value, Outstanding	$ 66,930
Aggregate Intrinsic Value, Exercisable	$ 60,783

Share-Based Compensation - Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 2,603	$ 2,204
Tax effect of share-based compensation	(1,041)	(882)
Share-based compensation expense, net of tax	1,562	1,322
Instructional Costs and Services [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	1,549	1,312
Admissions Advisory and Related Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	44	37
Marketing and Promotional [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	46	60
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 964	$ 795

Treasury Stock - Additional Information (Detail) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Stockholders Equity [Line Items]
Expiration date on repurchase authorizations	Sep. 30, 2015
Common Stock [Member]
Stockholders Equity [Line Items]
Common stock acquired, shares	0	2,787
Since Approval of Share Repurchase Plan [Member]
Stockholders Equity [Line Items]
Aggregate cost shares of common stock	$ 49,135,000
Remaining authorized repurchase amount	25,865,000
Maximum [Member]
Stockholders Equity [Line Items]
Authorization amount for repurchase of common stock	$ 75,000,000

Share-Based Compensation - Summary of Activity Related to Stock Options Granted under Company's Incentive Plan (Parenthetical) (Detail) (USD $)	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Value of closing stock price	$ 43.30