Discontinued Operations (Details Textual) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended						12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Jan. 02, 2011	Dec. 31, 2012 Residential Treatment Services [Member]	Dec. 31, 2012 Residential Treatment Services [Member]	Jan. 01, 2012 Residential Treatment Services [Member]	Jan. 02, 2011 Residential Treatment Services [Member]	Apr. 19, 2012 East Mississippi Correctional Facility [Member] bed	Aug. 13, 2012 Marshall County Correctional Facility [Member] bed	Dec. 31, 2012 Walnut Grove Youth Correctional Facility [Member] bed	Dec. 31, 2012 Services Agreement [Member]	Dec. 31, 2012 License Agreement [Member]	Dec. 31, 2012 License Agreement [Member]	Dec. 31, 2012 July Two-Thousand And Eleven Stock Repurchase Program [Member]	Jan. 01, 2012 July Two-Thousand And Eleven Stock Repurchase Program [Member]	Dec. 31, 2012 July Two-Thousand And Eleven Stock Repurchase Program [Member] Residential Treatment Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long Lived Assets Held-for-sale, Proceeds from Sale	$ 36,000,000
Proceeds from RTS divestiture	33,253,000	0	0
Stock Repurchased During Period, Shares														297,741	3,900,000	295,959
Treasury Stock, Value, Acquired, Cost Method	(8,666,000)	(74,982,000)	(80,000,000)		8,600,000									8,700,000	75,000,000
Long-Term Purchase Commitment, Earn-Out	5,000,000
Purchase Price Adjustment, Measurement Term, Events	1 year
Purchase Price Adjustment, Measurement Term, Contracts	1 year
Services Agreement Contract Term											5 years
Sales Revenue, Services, Other											1,800,000
Fair Value Inputs, Discount Rate											10.00%	10.00%
Licensing Agreement Contract Term													5 years
Licenses Revenue													400,000
Number of beds discontinued								1,500	1,000	1,450
Loss on sale of discontinued operation, net of tax				14,600,000
Business Exit Costs	2,100,000
Revenue recorded as discontinued operation	$ 24,500,000	$ 44,900,000	$ 36,600,000		$ 167,200,000	$ 160,800,000	$ 148,800,000