Business Combination (Details1) (Cornell Companies, Inc. [Member], USD $) In Thousands			6 Months Ended
	Jul. 03, 2011	Jan. 02, 2011 Acquisition Date Estimated Fair Value [Member]	Jul. 03, 2011 Scenario, Adjustment [Member]
Purchase price allocation to assets acquired and liabilities assumed
Accounts receivable	$ 55,436	$ 55,142
Prepaid and other current assets	12,981	13,314
Deferred income tax assets	21,273	21,273
Restricted assets	44,096	44,096
Property and equipment	462,771	462,771
Intangible assets	75,800	75,800
Out of market lease assets	472	472
Other long-term assets	7,510	7,510
Total assets acquired	680,339	680,378
Accounts payable and accrued expenses	(55,941)	(56,918)
Fair value of non-recourse debt	(120,943)	(120,943)
Out of market lease liabilities	(24,071)	(24,071)
Deferred income tax liabilities	(42,771)	(42,771)
Other long-term liabilities	(1,368)	(1,368)
Total liabilities assumed	(245,094)	(246,071)
Total identifiable net assets	435,245	434,307
Goodwill	203,786	204,724
Fair value of Cornell's net assets	639,031	639,031
Noncontrolling interest	(20,700)	(20,700)
Total consideration for Cornell, net of cash acquired	618,331	618,331
Measurement Period Adjustments, Accounts receivable			294
Measurement Period Adjustments, Prepaid and other current assets			(333)
Measurement Period Adjustments, Assets Acquired			(39)
Measurement Period Adjustments, Accounts payable and accrued expenses			977
Measurement Period Adjustments Liabilities Assumed			977
Measurement Period Adjustments Identifiable Net Assets			938
Measurement Period Adjustments, Goodwill			$ (938)