Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Line Items]
Establishment of goodwill						This goodwill was established in connection with the acquisition of Avalon Correctional Services, Inc. ("Avalon") in the fourth quarter of 2015, as further described in Note 6, the acquisition of Correctional Alternatives, Inc. during the third quarter of 2013, and the acquisitions of two service companies during 2000.
Goodwill		$ 16,110				$ 35,557	$ 16,110
Asset impairment charges		$ 27,800				$ 955	$ 30,082	$ 6,513
Winn Correctional Center
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment charges	$ 1,000
Bay Correctional Facility in Florida
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment charges			$ 1,100
Idaho Correctional Center
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment charges				$ 1,000
Wilkinson County Correctional Facility
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment charges					$ 800
Asset impairment charges					2,600
Other assets impairment charges					$ 1,800