Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Shell Company Statement of Financial Position [Abstract] Assets [Abstract] ASSETS: Assets, Current [Abstract] Current assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash and Cash Equivalents, Current Restricted cash and cash equivalents Investments Investments Accounts Receivable, Net, Current Accounts receivable, net Interest Receivable Interest receivable on secured note Income Taxes Receivable, Current Income tax receivable Other Assets, Current Other assets Other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Notes, Loans and Financing Receivable, Net, Noncurrent Note receivable Prepaid royalties noncurrent. Prepaid Royalties Noncurrent Prepaid royalties Goodwill Goodwill Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY: Liabilities, Current [Abstract] Current liabilities Accounts Payable, Current Accounts payable Employee-related Liabilities, Current Accrued compensation and benefits Accrued Liabilities, Current Accrued and other liabilities Accrued liabilities Accrued Income Taxes, Current Income taxes payable Contract with Customer, Liability, Current Student deposits Deferred Revenue, Current Deferred revenue Notes Payable, Current Current portion of notes payable Less: Current portion Liabilities, Current Total current liabilities Other Liabilities, Noncurrent Other noncurrent liabilities Deferred Tax Liabilities, Net, Noncurrent Deferred income taxes, noncurrent Notes Payable, Noncurrent Note payable Notes payable, less current portion Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity Preferred Stock, Value, Issued Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at December 31, 2018 and 2017 Common Stock, Value, Issued Common stock, $0.01 par value, 100,000 shares authorized; 52,690 and 52,277 shares issued and 48,201 and 48,125 shares outstanding at December 31, 2018 and 2017, respectively Treasury Stock, Value Treasury stock, at cost, 4,489 and 4,152 shares of common stock at December 31, 2018 and 2017, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Ending Balance Beginning Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock authorized but unissued and undesignated Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Treasury Stock, Shares Treasury stock, shares Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Products And Services [Domain] Product and Service [Domain] Service [Member] Service [Member] University related revenue. University Related Revenue [Member] University Related Revenue [Member] Statement [Line Items] Statement [Line Items] Revenue from Contract with Customer, Excluding Assessed Tax Net revenue Net Revenues Costs and Expenses [Abstract] Costs and expenses: Technology and academic services. Technology and Academic Services Technology and academic services Counseling services and support. Counseling Services and Support Counseling services and support Marketing Expense Marketing and communication General and Administrative Expense General and administrative University related expenses. University Related Expenses University related expenses Loss on transaction. Loss on transaction Loss on transaction Loss on Transaction Costs and Expenses Total costs and expenses Operating Income (Loss) Operating income Operating income Interest Income on Note Receivable. Interest income on Note Receivable Interest income on Secured Note Interest Expense Interest expense Interest expense Investment Income, Nonoperating Investment interest and other Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income before income taxes Income Tax Expense (Benefit) Income tax expense Income Tax Expense (Benefit), Total Net Income (Loss) Attributable to Parent Net income Net income Earnings Per Share [Abstract] Earnings per share: Earnings Per Share, Basic Basic income per share Earnings Per Share, Diluted Diluted income per share Weighted Average Number of Shares Outstanding, Basic Basic weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted weighted average shares outstanding Diluted weighted average shares outstanding Statement of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Unrealized gains (losses) on hedging derivatives, net of taxes of $39, $6, and $94 for the years ended December 31, 2018, 2017 and 2016, respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized gains (losses) on available for sale securities, net of taxes of $103, $108 and $168 for the years ended December 31, 2018, 2017 and 2016, respectively Effective portion of gain/loss on derivatives included as a component of other comprehensive income, net of taxes Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive income Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Unrealized gains (losses) on hedging derivatives, taxes Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Unrealized gains (losses) on available for sale securities, taxes Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Treasury Stock [Member] Treasury Stock [Member] Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings [Member] Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update 2018-02. Accounting Standards Update201802 [Member] Accounting Standards Update 2018-02 [Member] Shares, Issued Ending Balance, Shares Beginning Balance, Shares Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative effect from the adoption of accounting pronouncements, net of taxes Cumulative effect from the adoption of accounting pronouncements, net of taxes New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Adoption impact - ASU 2018-02 Treasury Stock, Value, Acquired, Cost Method Common stock purchased for treasury Aggregate cost shares of common stock Treasury Stock, Shares, Acquired Common stock acquired, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Restricted shares forfeited, Shares Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Share-based compensation Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share-based compensation, Shares Shares issued under plan Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Total Shares, Exercised Exercise of stock options, Shares Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax expense recorded as an increase of paid-in capital Excess tax benefits Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows provided by operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Allocated Share-based Compensation Expense Share-based compensation Share-based compensation expense Provision for Doubtful Accounts Provision for bad debts Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Deferred Income Taxes and Tax Credits Deferred income taxes Gain (loss) on transaction, net of costs and asset impairment. Gain Loss on transaction, net of costs and asset impairment Loss on transaction, net of costs and asset impairment Other Noncash Income (Expense) Other, including fixed asset impairments Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable from GCU Accounts receivable related to university operations. Accounts Receivable Related to University Operations Accounts receivable Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other Increase (Decrease) in Accounts Payable, Trade Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase (Decrease) in Income Taxes Payable Income taxes receivable/payable Increase decrease in deferred rent. Increase Decrease In Deferred Rent Deferred rent Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Contract with Customer, Liability Student deposits Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows used in investing activities: Payments to Acquire Productive Assets Capital expenditures Purchase of land related to off site development. Purchase Of Land Related To Offsite Development Purchases of land and building improvements related to off-site development Payments for (Proceeds from) Productive Assets Disposition Payments of funding at closing in excess of required capital. Payments of funding at closing in excess of required capital Funding to GCU at closing in excess of required capital Proceeds from repayment of excess funds. Proceeds from repayment of excess funds Repayment of excess funds by GCU Loans for funding of capital expenditure. Loans for Funding of Capital Expenditure Funding to GCU for capital expenditures Proceeds from Sale of Notes Receivable Proceeds received from note receivable Proceeds from Equity Method Investment, Distribution, Return of Capital Return of equity method investment Payments to Acquire Available-for-sale Securities Purchases of investments Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Proceeds from sale or maturity of investments Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows used in financing activities: Repayments of Debt and Capital Lease Obligations Principal payments on notes payable and capital lease obligations Payments of Debt Issuance Costs Debt issuance costs Proceeds from (Repayments of) Lines of Credit Net borrowings from revolving line of credit Payments for Repurchase of Common Stock Repurchase of common shares including shares withheld in lieu of income taxes Proceeds from Stock Options Exercised Net proceeds from exercise of stock options Net Cash Provided by (Used in) Financing Activities Net cash (used in) provided by financing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net (decrease) increase in cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents and restricted cash, end of period Cash and cash equivalents and restricted cash, beginning of period Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Income Taxes Paid Cash paid for income taxes Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash investing and financing activities Sale transaction to affiliates through secured note financing. Sale Transaction to Affiliates Through Secured Note Financing Sale transaction to GCU through Secured Note financing Purchases of property and equipment included in accounts payable. Purchases Of Property And Equipment Included In Accounts Payable Purchases of property and equipment included in accounts payable Reclassification of capitalized costs due to adoption of ASC 606 Reclassification of capitalized costs due to adoption of ASC 606 Reclassification of capitalized costs - adoption of ASC 606 Reclassification of deferred revenue due to adoption of ASC 606 Reclassification of deferred revenue due to adoption of ASC 606 Reclassification of deferred revenue - adoption of ASC 606 Reclassification of tax effect within accumulated other comprehensive income. Reclassification of tax effect within accumulated other comprehensive income Reclassification of tax effect within accumulated other comprehensive income Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of Operations [Text Block] Nature of Business Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] The Transaction Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Investments, Debt and Equity Securities [Abstract] Cost and Equity Method Investments Disclosure [Text Block] Investments Valuation and Qualifying Accounts [Abstract] Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Valuation and Qualifying Accounts Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Payables and Accruals [Abstract] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block] Notes Payable and Other Noncurrent Liabilities Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments Earnings Per Share [Text Block] Earnings Per Share Equity [Abstract]