Subsequent Events (Details) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended				0 Months Ended		0 Months Ended	1 Months Ended
	May 07, 2013	Mar. 31, 2013 bed	May 08, 2013 Subsequent Event	May 07, 2013 Subsequent Event Joe Corley Detention Center bed	Apr. 03, 2013 Credit Agreement Maximum	Apr. 03, 2013 Credit Agreement Minimum	Apr. 03, 2013 Line of Credit Term Loan BNP Paribas Subsequent Event	Apr. 03, 2013 Line of Credit Term Loan BNP Paribas Minimum Subsequent Event	Apr. 03, 2013 Line of Credit New Revolver BNP Paribas Subsequent Event	May 31, 2013 Restricted Stock [Member] Subsequent Event
Subsequent Event [Line Items]
Debt instrument basis spread on variable rate							2.50%	0.75%	2.50%
Debt Instrument, Description of Variable Rate Basis							LIBOR		LIBOR
Line of Credit Facility, Maximum Borrowing Capacity							$ 300,000,000		$ 700,000,000
Line of Credit Facility, Interest Rate Description							LIBOR plus 2.50% (with a LIBOR floor of 0.75%)		LIBOR plus 2.50% (with no LIBOR floor)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		0								300,000
Total leverage ratio					5.75
Senior secured leverage ratio					3.50
Interest coverage ratio						3.00
Common Stock, Dividends, Per Share, Declared	$ 0.50
Authorized amount of stock repurchase			100,000,000
Number of beds		72,000		1,287
Purchase price of facility acquisition				$ 65,000,000