Condensed Consolidating Financial Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	$ 427,369us-gaap_SalesRevenueServicesNet	$ 393,137us-gaap_SalesRevenueServicesNet
Operating expenses	317,909us-gaap_OperatingCostsAndExpenses	291,923us-gaap_OperatingCostsAndExpenses
Depreciation and amortization	24,940us-gaap_DepreciationAndAmortization	24,142us-gaap_DepreciationAndAmortization
General and administrative expenses	31,848us-gaap_GeneralAndAdministrativeExpense	28,502us-gaap_GeneralAndAdministrativeExpense
Operating income	52,672us-gaap_OperatingIncomeLoss	48,570us-gaap_OperatingIncomeLoss
Interest income	2,073us-gaap_InvestmentIncomeInterest	732us-gaap_InvestmentIncomeInterest
Interest expense	(24,646)us-gaap_InterestExpense	(20,652)us-gaap_InterestExpense
Income before income taxes and equity in earnings of affiliates	30,099	28,650
Income tax provision	2,828us-gaap_IncomeTaxExpenseBenefit	2,138us-gaap_IncomeTaxExpenseBenefit
Equity in earnings of affiliates, net of income tax provision	1,485	1,484
Income before equity in income of consolidated subsidiaries	28,756	27,996
Income from consolidated subsidiaries, net of income tax provision	0	0
Net income	28,756us-gaap_ProfitLoss	27,996us-gaap_ProfitLoss
Net loss (income) attributable to noncontrolling interests	21	(6)
Net income attributable to The GEO Group, Inc.	28,777us-gaap_NetIncomeLoss	27,990us-gaap_NetIncomeLoss
Other comprehensive income (loss)	(5,721)	1,046
Total comprehensive income	23,035	29,042
Comprehensive loss (income) attributable to noncontrolling interests	37	(2)
Comprehensive income attributable to The GEO Group, Inc.	23,072us-gaap_ComprehensiveIncomeNetOfTax	29,040us-gaap_ComprehensiveIncomeNetOfTax
The GEO Group, Inc.
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	144,383	134,754
Operating expenses	116,225	107,222
Depreciation and amortization	6,203	6,406
General and administrative expenses	10,323	9,339
Operating income	11,632	11,787
Interest income	6,178	5,536
Interest expense	(14,310)	(11,074)
Income before income taxes and equity in earnings of affiliates	3,500	6,249
Income tax provision	0	0
Equity in earnings of affiliates, net of income tax provision	0	0
Income before equity in income of consolidated subsidiaries	3,500	6,249
Income from consolidated subsidiaries, net of income tax provision	25,256	21,747
Net income	28,756	27,996
Net loss (income) attributable to noncontrolling interests	0	0
Net income attributable to The GEO Group, Inc.	28,756	27,996
Other comprehensive income (loss)	0	0
Total comprehensive income	28,756	27,996
Comprehensive loss (income) attributable to noncontrolling interests	0	0
Comprehensive income attributable to The GEO Group, Inc.	28,756	27,996
Combined Subsidiary Guarantors
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	339,887	314,985
Operating expenses	268,781	250,680
Depreciation and amortization	17,697	16,634
General and administrative expenses	16,880	15,536
Operating income	36,529	32,135
Interest income	1,231	436
Interest expense	(14,636)	(13,763)
Income before income taxes and equity in earnings of affiliates	23,124	18,808
Income tax provision	1,740	1,294
Equity in earnings of affiliates, net of income tax provision	0	0
Income before equity in income of consolidated subsidiaries	21,384	17,514
Income from consolidated subsidiaries, net of income tax provision	0	0
Net income	21,384	17,514
Net loss (income) attributable to noncontrolling interests	0	0
Net income attributable to The GEO Group, Inc.	21,384	17,514
Other comprehensive income (loss)	40	19
Total comprehensive income	21,424	17,533
Comprehensive loss (income) attributable to noncontrolling interests	0	0
Comprehensive income attributable to The GEO Group, Inc.	21,424	17,533
Combined Non-Guarantor Subsidiaries
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	64,967	52,331
Operating expenses	54,771	42,954
Depreciation and amortization	1,040	1,102
General and administrative expenses	4,645	3,627
Operating income	4,511	4,648
Interest income	2,137	679
Interest expense	(3,173)	(1,734)
Income before income taxes and equity in earnings of affiliates	3,475	3,593
Income tax provision	1,088	844
Equity in earnings of affiliates, net of income tax provision	1,485	1,484
Income before equity in income of consolidated subsidiaries	3,872	4,233
Income from consolidated subsidiaries, net of income tax provision	0	0
Net income	3,872	4,233
Net loss (income) attributable to noncontrolling interests	21	(6)
Net income attributable to The GEO Group, Inc.	3,893	4,227
Other comprehensive income (loss)	(5,761)	1,027
Total comprehensive income	(1,889)	5,260
Comprehensive loss (income) attributable to noncontrolling interests	37	(2)
Comprehensive income attributable to The GEO Group, Inc.	(1,852)	5,258
Eliminations
Consolidated Statements of Income and Comprehensive Income [Abstract]
Revenues	(121,868)	(108,933)
Operating expenses	(121,868)	(108,933)
Depreciation and amortization	0	0
General and administrative expenses	0	0
Operating income	0	0
Interest income	(7,473)	(5,919)
Interest expense	7,473	5,919
Income before income taxes and equity in earnings of affiliates	0	0
Income tax provision	0	0
Equity in earnings of affiliates, net of income tax provision	0	0
Income before equity in income of consolidated subsidiaries	0	0
Income from consolidated subsidiaries, net of income tax provision	(25,256)	(21,747)
Net income	(25,256)	(21,747)
Net loss (income) attributable to noncontrolling interests		0
Net income attributable to The GEO Group, Inc.	(25,256)	(21,747)
Other comprehensive income (loss)	0	0
Total comprehensive income	(25,256)	(21,747)
Comprehensive loss (income) attributable to noncontrolling interests	0	0
Comprehensive income attributable to The GEO Group, Inc.	$ (25,256)	$ (21,747)

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