Equity [Abstract] Dividends Declared Dividends Declared [Table Text Block] Income Tax Disclosure [Abstract] Federal income taxes: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Federal Income Tax Expense (Benefit) Federal Income Tax Expense (Benefit), Continuing Operations, Total Federal Income Tax Expense (Benefit), Continuing Operations State income taxes: State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) Deferred Deferred State and Local Income Tax Expense (Benefit) State and Local Income Tax Expense (Benefit), Continuing Operations, Total State and Local Income Tax Expense (Benefit), Continuing Operations Foreign income taxes: Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Foreign Tax Expense (Benefit) Deferred Deferred Foreign Income Tax Expense (Benefit) Foreign Income Tax Expense (Benefit), Continuing Operations, Total Foreign Income Tax Expense (Benefit), Continuing Operations Total provision for income taxes Income Tax Expense (Benefit), Continuing Operations, Discontinued Operations Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] U.S. Corrections & Detention US Corrections and Detention [Member] US corrections and detention. GEO Community Services GEO Community Services [Member] GEO Community Services International Services International Services Segment [Member] International Services Segment. Goodwill [Line Items] Goodwill [Line Items] Changes in the Company's goodwill balances Goodwill [Roll Forward] Beginning balance Goodwill Acquisitions Goodwill, Acquired During Period Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Ending balance Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial Instruments Financial Instruments Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Noncurrent Assets Other Noncurrent Assets [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Revolver Revolver [Member] Revolver. Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter of credit Letter of Credit [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Ravenhall Ravenhall [Member] Ravenhall [Member] SACS South African Custodial Services Pty Limited [Member] South African Custodial Services Pty Limited. Canada Facility Canada Facility [Member] Canada Facility [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] GEO Amey GEO Amey [Member] GEO Amey. Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Number of letters of guarantee outstanding under separate international facilities relating to performance guarantees Number of letters of guarantee outstanding under separate international facilities relating to performance guarantees Number of letters of guarantee outstanding under separate international facilities relating to performance guarantees. Letters of guarantee outstanding relating to performance guarantees Letters of Credit Outstanding Relating to Performance Guarantees Letters of credit outstanding relating to performance guarantees. Maximum loan amount under stand by facility to SACS Maximum Loan Amount under SACS Shareholder's Loan Maximum loan amount under SACS shareholder's loan. Potential estimated exposure of tax obligations Potential Estimated Exposure of tax obligations Potential estimated exposure of tax obligations. Liability related to potential tax exposure Liability Related to Potential Tax Exposure Liability related to potential tax exposure. Variable interest entity ownership percentage in joint venture Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Lines of credit Working Capital Line of Credit Working capital line of credit. Due from joint venture, current Due from Joint Ventures, Current Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Notes Senior Notes [Member] 6.625% Senior Notes Six Point Six Two Five Percent Senior Notes Due 2021 [Member] six point six two five percent senior notes due 2021 Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Debt instrument, face amount Debt Instrument, Face Amount Repurchase amount Debt Instrument, Repurchase Amount Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Equity Incentive Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Debt Debt Disclosure [Text Block] Condensed Consolidating Financial Information Disclosure [Abstract] Condensed Consolidating Financial Information Disclosure Abstract Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Legal Entities Reportable Legal Entities [Member] Eliminations Consolidation, Eliminations [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] The GEO Group Inc. Parent Company [Member] Combined Subsidiary Guarantors Guarantor Subsidiaries [Member] Combined Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] CONDENSED CONSOLIDATING BALANCE SHEET Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash and investments, current Restricted Cash and Investments, Current Accounts receivable, less allowance for doubtful accounts Accounts Receivable, Net, Current Current deferred income tax assets Deferred Tax Assets, Net of Valuation Allowance, Current Contract receivable, current portion Contract Work In Process, current Contract Work In Process, current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Restricted cash and investments, non-current Restricted Cash and Investments, Noncurrent Property and equipment, net Property, Plant and Equipment, Net Direct Finance Lease Receivable Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent Non-Current Contract Receivable Contract Work In Process, Noncurrent Contract Work In Process, Noncurrent Intercompany Receivable Due from Related Parties, Noncurrent Non-Current Deferred Income Tax Assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Goodwill Intangible Assets, Net Intangible Assets, Net (Excluding Goodwill) Investment in Subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other Non-Current Assets Other Assets, Noncurrent Total Assets Assets Current Liabilities Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued payroll and related taxes Employee-related Liabilities, Current Accrued expenses and other current liabilities Accrued Liabilities, Current Current portion of capital lease obligations, long-term debt and non-recourse debt Long-term Debt and Capital Lease Obligations, Current Total current liabilities Liabilities, Current Non-Current Deferred Income Tax Liabilities Deferred Tax Liabilities, Net, Noncurrent Intercompany Payable Due to Related Parties, Noncurrent Other Non-Current Liabilities Other Liabilities, Noncurrent Capital Lease Obligations Capital Lease Obligations, Noncurrent Long-Term Debt Long-term Debt, Excluding Current Maturities Non-Recourse Debt Noncurrent Portion of Non-Recourse Debt Noncurrent portion of non-recourse debt . Commitments and Contingencies Commitments and Contingencies Total shareholders’ equity attributable to The GEO Group, Inc. Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total shareholders’ equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Liabilities and Shareholders’ Equity Liabilities and Equity Commitments and Contingencies Disclosure [Abstract] Future minimum commitments under leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Quarterly Financial Data [Abstract] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Property, Plant and Equipment [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings and improvements Building Improvements [Member] Leasehold improvements Leasehold Improvements [Member] Equipment Equipment [Member] Furniture, fixtures and computer software Furniture, Fixtures and Computer Software [Member] Furniture, fixtures and computer software. Facility construction in progress Construction in Progress [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property Plant And Equipment Net By Type [Abstract] Property, Plant and Equipment, Net, by Type [Abstract] Useful life Property, Plant and Equipment, Useful Life Property and equipment, gross Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Statement of Comprehensive Income [Abstract] Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Pension liability adjustment, net of income tax (provision) benefit of $114, $(867) and $1,621, respectively Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Change in fair value of derivative instrument classified as cash flow hedge, net of income tax (provision) benefit of $(337), $213 and $2,926, respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to The GEO Group, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] 0-18.23 Exercise Prices Range Two [Member] Exercise prices range two. 18.24-22.26 Exercise Prices Range Four [Member] Exercise prices range four. 22.27-29.39 Exercise Prices Range Five [Member] Exercise prices range five. 29.40-43.15 Exercise Price Range Six [Member] Exercise Price Range Six Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Granted, Wtd. Avg. grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Options granted, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercise prices and related information of stock option outstanding Schedule of Share Based Compensation Shares Authorized Under Stock Option Plans by Exercise Price Range [Abstract] Schedule of share based compensation shares authorized under stock option plans by exercise price range. Lower range limit, Exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Upper range limit, Exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Options outstanding, number outstanding (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Options outstanding, Wtd. Avg. remaining contractual life Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Options outstanding, Wtd. Avg. exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Options exercisable, Number exercisable (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Options exercisable Wtd. Avg. Remaining Contractual Life Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term Options exercisable, Wtd. Avg. exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Company's quarterly financial data Quarterly Financial Information [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Income Statement [Abstract] Revenues Sales Revenue, Services, Net Operating Expenses (excluding depreciation and amortization) Operating Costs and Expenses Depreciation and Amortization Depreciation, Depletion and Amortization, Nonproduction General and administrative expenses General and Administrative Expense Operating Income Operating Income (Loss) Interest Income Investment Income, Interest Interest Expense Interest Expense Loss on Extinguishment of Debt Income Before Income Taxes and Equity in Earnings of Affiliates Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for Income Taxes Income Tax Expense (Benefit) Equity in Earnings of Affiliates, net of income tax provision of $2,341, $2,038 and $2,302 Income (Loss) from Equity Method Investments Less: loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net Income Attributable to The GEO Group, Inc. Net Income (Loss) Attributable to Parent Weighted Average Common Shares Outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Income per Common Share Attributable to The GEO Group, Inc.: Earnings Per Share [Abstract] Basic earnings per share Earnings Per Share, Basic [Abstract] Net income per share — basic (in dollars per share) Earnings Per Share, Basic Diluted: Earnings Per Share, Diluted [Abstract] Net income per share — diluted (in dollars per share) Earnings Per Share, Diluted Dividends declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared 5.875% Senior Notes due 2024 Five Point Eight Seven Five Percent Senior Notes Due 2024 [Member] Five Point Eight Seven Five Percent Senior Notes Due 2024 [Member] 5.125% Senior Notes Five Point One Two Five Percent Senior Notes Due 2023 [Member] 5.125% Senior Notes Due 2023 [Member] 5.875% Senior Notes Five Point Eight Seven Five Percent Senior Notes Due 2022 [Member] Five Point Eight Seven Five Percent Senior Notes Due 2022 [Member] 7.75% Senior Notes Seven Point Seven Five Percent Senior Notes [Member] seven point seven five percent Senior notes. Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Redemption, Period 2017 Debt Instrument, Redemption, Period Two [Member] Redemption, Period 2018 Debt Instrument, Redemption, Period Three [Member] Redemption, Period 2019 Debt Instrument, Redemption, Period Four [Member] 2020 and thereafter Debt Instrument, Redemption, Period Five [Member] Line of Credit, amount outstanding Long-term Line of Credit Notice period prior to redemption Debt Instrument, Notice Period Prior to Redemption Debt Instrument, Notice Period Prior to Redemption Percentage of principal amount redeemable Debt Instrument, Redemption Period, Change in Control, Percentage of Principal Amount Redeemable Debt Instrument, Redemption Period, Change in Control, Percentage of Principal Amount Redeemable Redemption price percentage Debt Instrument, Redemption Price, Percentage Redemption period, principal amount redeemable Debt Instrument, Redemption Period, Percentage of Principal Amount Redeemable Debt Instrument, Redemption Period, Percentage of Principal Amount Redeemable Debt covenant, asset proceeds, excess proceeds Debt Covenant, Asset Proceeds, Excess Proceeds Debt Covenant, Asset Proceeds, Excess Proceeds Debt covenant, indenture agreement, period after notice Debt Covenant, Indenture Agreement, Period After Notice Debt Covenant, Indenture Agreement, Period After Notice Capitalized loan costs Unamortized Debt Issuance Expense SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract] Real Estate and Accumulated Depreciation SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] Consolidated Statements of Income and Comprehensive Income [Abstract] Operating expenses Depreciation and amortization Operating income Interest Income Interest Expense Loss on extinguishment of debt Income before income taxes and equity in earnings of affiliates Provision for Income Taxes Equity in earnings (losses) of affiliates, net of income tax provision Income (loss) from continuing operations before equity in income of consolidated subsidiaries Income from Continuing Operations before Equity in Income of Consolidated Subsidiaries Income From Continuing Operations Before Equity In Income Of Consolidated Subsidiaries. Income from consolidated subsidiaries, net of income tax provision Equity in Income of Consolidated Subsidiaries Net of Tax Equity in Income of Consolidated Subsidiaries Net of Tax Net Income Net income attributable to The GEO Group, Inc. Other comprehensive income (loss), net of tax Total comprehensive income Comprehensive income attributable to The GEO Group, Inc. Statement of Cash Flows [Abstract] Cash Flow from Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income attributable to The GEO Group, Inc. to net cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Depreciation, Depletion and Amortization Deferred tax benefit Deferred Income Tax Expense (Benefit) Amortization of debt issuance costs, discount and/or premium Amortization of Debt Issuance Costs and Discounts Stock-based compensation Share-based Compensation Loss on derivative instrument Derivative, Gain (Loss) on Derivative, Net Provision for doubtful accounts Provision for Doubtful Accounts Exit charges related to non-core operating leases Business Exit Costs Equity in earnings of affiliates, net of tax Tax deficiency (benefit) related to equity compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Loss (gain) on sale/disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Dividends received from unconsolidated joint venture Proceeds from Equity Method Investment, Dividends or Distributions Changes in assets and liabilities, net of acquisition: Increase (Decrease) in Operating Capital [Abstract] Changes in accounts receivable, prepaid expenses and other assets Increase (Decrease) in Operating Assets Changes in contract receivable Increase (Decrease) in Contract Receivables, Net Changes in accounts payable, accrued expenses and other liabilities Increase (Decrease) in Operating Liabilities Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flow from Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of LCS, cash consideration Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Protocol, cash consideration, net of cash acquired Payments to Acquire Business Two, Net of Cash Acquired Acquisition of SoberLink, cash consideration Payments to Acquire Business Three, Net of Cash Acquired Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Insurance proceeds - damaged property Proceeds from Insurance Settlement, Investing Activities Change in restricted cash and investments Increase (Decrease) in Restricted Cash Capital expenditures Payments for Purchase of Property Plant Equipment Facility Development and Expansions Payments for purchase of property plant equipment facility development and expansions. Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash Flow from Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Payments on long-term debt Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Proceeds from long term debt Proceeds from Issuance of Long-term Debt Payments on non-recourse debt Repayments of Other Debt Proceeds from non-recourse debt Proceeds from Other Debt Taxes paid related to net share settlements of equity awards Payments Related to Tax Withholding for Share-based Compensation Debt issuance costs - deferred Payments of Debt Issuance Costs Proceeds from stock options exercised Proceeds from Stock Options Exercised Tax (deficiency) benefit related to equity compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Proceeds from reissuance of treasury stock in connection with ESPP Proceeds from Sale of Treasury Stock Issuance of common stock under prospectus supplement Proceeds from Issuance of Common Stock Under Prospectus Supplement Proceeds from Issuance of Common Stock Under Prospectus Supplement Dividends paid Payments of Ordinary Dividends, Common Stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of Exchange Rate Changes on Cash and Cash Equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net Increase (Decrease) in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents, beginning of period Cash and Cash Equivalents, end of period Supplemental Disclosures Supplemental Cash Flow Elements [Abstract] Cash paid during the year for: Supplemental Cash Flow Information [Abstract] Income taxes Income Taxes Paid Interest Interest Paid, Net Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Capital expenditures in accounts payable and accrued expenses Construction in Progress Expenditures Incurred but Not yet Paid Organization, Consolidation and Presentation of Financial Statements [Abstract] General liability insurance maximum recoverage per occurrence General Liability Insurance Maximum Recoverage Per Occurrence General liability insurance maximum recoverage per occurrence. General liability insurance maximum coverage in aggregate General Liability Insurance Maximum Coverage In Aggregate General Liability Insurance Maximum Coverage In Aggregate GEO care insurance maximum recoverable per occurrence Segment Insurance Maximum Recoverage Per Occurrence Segment insurance maximum recoverage per occurrence. Deductible amount for general insurance liability and hospital professional insurance liability Deductible Amount for General Insurance Liability and Hospital Professional Insurance Liability Deductible amount for general insurance liability and hospital professional insurance liability. Deductible amount for worker's compensation insurance liability Deductible Amount for Worker's Compensation Insurance Liability Deductible amount for worker's compensation insurance liability. Deductible amount for automobile insurance liability Deductible Amount for Automobile Insurance Liability Deductible amount for automobile insurance liability. Undiscounted reserves for workers compensation and general liability claims Self Insurance Reserve Future minimum rentals on lease Schedule of Future Minimum Rental Revenues for Operating Leases [Table Text Block] Schedule of future minimum rental revenues for operating leases. Components of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Fair value of stock-based awards Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Fair value assumptions of restricted stock Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions [Table Text Block] Dividends Payable [Table] Dividends Payable [Table] Dividends [Axis] Dividends [Axis] Dividends [Domain] Dividends [Domain] Dividend Paid Dividend Paid [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Qualified Qualified Shareholder [Member] Qualified Shareholder [Member] Non-Qualified NonQualified Shareholder [Member] NonQualified Shareholder [Member] Nondividend Distributions Return Of Capital [Member] Return Of Capital Dividends Payable [Line Items] Dividends Payable [Line Items] Distribution Per Share (in dollars per share) Dividends Payable, Amount Per Share Aggregate Payment Amount Dividends Payable Compensation and Retirement Disclosure [Abstract] Components of Net Periodic Benefit Cost Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Net loss Defined Benefit Plan, Future Amortization of Gain (Loss) Net periodic pension cost Defined Benefit Plan, Net Periodic Benefit Cost Weighted Average Assumptions for Expense Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount Rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Property and Equipment (Textual) [Abstract] Property and Equipment (Textual) [Abstract] Property and Equipment. Depreciation expense Depreciation Assets under capital leases Capital Leased Assets, Gross Accumulated amortization related to capital leases Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Depreciation expense related to capital leases Capital Leases, Income Statement, Amortization Expense Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Award Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Summary of the activity of restricted stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted stock outstanding shares, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited/canceled shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Restricted stock outstanding shares, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Beginning Balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted Wtd. Avg. Grant Date Fair Value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested Wtd. Avg. Grant Date Fair Value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited/Canceled Wtd. Avg. Grant Date Fair Value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Ending Balance (in dollars per share) Unrecognized compensation costs related to awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Expected weighted average period to recognize expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] Land improvements Land Improvements [Member] Building Building [Member] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] Useful life SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation Federal income tax purposes SEC Schedule III, Real Estate, Federal Income Tax Basis Real Estate: SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward] Beginning balance SEC Schedule III, Real Estate, Gross Additions to/improvements of real estate Real Estate, Additions and Improvements Real Estate, Additions and Improvements Assets sold/written-off Real Estate, Assets Sold and Write Offs Real Estate, Assets Sold and Write Offs Ending balance Accumulated Depreciation SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] Beginning balance SEC Schedule III, Real Estate Accumulated Depreciation Depreciation expense SEC Schedule III, Real Estate Accumulated Depreciation, Depreciation Expense Assets sold/written-off SEC Schedule III, Real Estate Accumulated Depreciation, Real Estate Sold Ending balance Accrued Liabilities, Current [Abstract] Summary of accrued expenses Schedule of Accrued Liabilities [Table Text Block] Segment Reporting [Abstract] Operating and Reporting Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Pre-Tax Income Reconciliation of Segments Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Asset Reconciliation of Segments Reconciliation of Assets from Segment to Consolidated [Table Text Block] Geographical Information Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Sources of Revenue Revenue from External Customers by Products and Services [Table Text Block] Business Concentration Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Domain] Property Subject to or Available for Operating Lease [Domain] Leased Facility 1 Leased Facility One [Member] Leased Facility One [Member] Leased Facility 2 Leased Facility Two [Member] Leased Facility Two [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Future minimum rentals on lease Operating Leases, Future Minimum Payments Receivable [Abstract] 2017 Operating Leases, Future Minimum Payments Receivable, Current 2018 Operating Leases, Future Minimum Payments Receivable, in Two Years Total Operating Leases, Future Minimum Payments Receivable Number of owned facilities leased to an unrelated party Property Subject to or Available for Operating Lease, Number of Units Period of lease Period Of Lease Period Of Lease Number of extensions for leases Number Of Lease Option Extensions Number Of Lease Option Extensions Period of lease extension option Period of Lease Extension Option Period of lease extension option. Carrying value of leased facility Carrying Value of Leased Facility Carrying value of leased facility. Accumulated depreciation of leased facility Accumulated Depreciation of Leased Facility Accumulated depreciation of leased facility. Rental income received on lease Operating Leases, Income Statement, Lease Revenue Schedule Of Entity Wide Revenue By Major Customers By Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenues Sales Revenue, Goods, Net [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] U S Federal Government U S Federal Government [Member] Various agencies of the U.S federal government. Entity Wide Revenue Major Customer [Line Items] Revenue, Major Customer [Line Items] Percentage of revenue Concentration Risk, Percentage Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Protocol Criminal Justice, Inc. Protocol Criminal Justice, Inc. [Member] Protocol Criminal Justice, Inc. [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Cash consideration Payments to Acquire Businesses, Gross Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Goodwill Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Number of votes per each share Common Stock, Voting Rights, Number Of Votes Per Each Share Common Stock, Voting Rights, Number Of Votes Per Each Share Common stock, voting rights Common Stock, Voting Rights Minimum % of REIT taxable income to be paid as dividend annually Minimum Percent Of REIT Taxable Income To Be Paid As Dividend Annually Minimum % of REIT taxable income (determined without regard to the dividends paid deduction and by excluding net capital gain) required to be paid out annually dividends. 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