Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended		1 Months Ended
	Jun. 30, 2013 Bed Facility	Jun. 30, 2012	Jun. 30, 2013 Bed Facility	Jun. 30, 2012	Dec. 31, 2012 Correctional Alternatives Inc. Bed	Dec. 31, 2012 Correctional Alternatives Inc. Assets Held under Capital Leases Bed	Jul. 31, 2013 Business Combinations Correctional Alternatives Inc. Facility
Subsequent Event [Line Items]
Business acquisition cash purchase price							$ 36,000,000
Number of facilities operated by company	68		68				2
Revenues	$ 432,894,000	$ 441,414,000	$ 857,700,000	$ 875,585,000	$ 10,000,000
Number of beds at the facility	92,000		92,000		120	483