Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Equity [Abstract]
Foreign currency translation adjustments, net of tax attributable to The GEO Group, Inc.	$ 4,462	[1]	$ 5,755	[1]
Unrealized loss on derivatives, net of tax	(344)		(457)
Pension adjustments, net of tax	(2,587)		(2,628)
Total	$ 1,531		$ 2,670

[1] The foreign currency translation, net of tax, related to noncontrolling interests was not significant at March 31, 2013 or December 31, 2012, respectively.