Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Feb. 28, 2014	Jun. 30, 2014 LegalMatter	Jun. 30, 2014 Hardeman County Correctional Facilities Corporation	Dec. 31, 1997 Hardeman County Correctional Facilities Corporation Facility
Loss Contingencies [Line Items]
Compensation amount on contractual disputes	$ (1)
Number of pending legal proceedings that would have an effect on consolidated financial position, results of operations, or cash flows		0
Issuance of revenue bonds				72.7
Number of beds at the facility				2,016
Outstanding principal balance of revenue bonds			23.9
Outstanding principal balance of the bonds exceeded the purchase price option			$ 10.5