Organization and Operations - Additional Information (Detail) ft² in Millions	Dec. 31, 2017 ft² Facility Property Bed State	Jun. 10, 2016 Bed	Aug. 27, 2015 Bed
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of facilities owned by government partners, managed	7
Number of beds at the facility | Bed		112	600
Number of properties leased to third parties and used by government agencies	12
Correctional, Detention, and Residential Reentry Facility
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of facilities owned by government partners, managed	7
Number of facilities owned and managed by the company	70
Number of beds at the facility | Bed	78,000
Number of states in which company facilities are located | State	19
Leased to Third-Parties
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of states in which company facilities are located | State	5
Number of properties leased to third parties and used by government agencies | Property	12
Number of square feet | ft²	1.1