Business Combinations - Additional Information (Detail) $ in Millions						12 Months Ended
	Dec. 07, 2019 USD ($) Facility Bed	Dec. 01, 2018 USD ($) State	Jan. 02, 2018 USD ($) State	Nov. 01, 2017 USD ($) Facility Bed	Jun. 01, 2017 USD ($) Bed	Dec. 31, 2018 Transaction	Dec. 31, 2017 Transaction
Business Acquisition [Line Items]
Number of purchase price transactions | Transaction						2	2
Center Point, Inc.
Business Acquisition [Line Items]
Aggregate purchase price					$ 5.3
Number of beds at the center | Bed					200
Time to Change, Inc.
Business Acquisition [Line Items]
Aggregate purchase price				$ 22.0
Number of beds at the center | Bed				422
Loss on settlement of contingent consideration				$ 6.1
Number of facilities | Facility				3
Rocky Mountain Offender Management Systems, LLC
Business Acquisition [Line Items]
Aggregate purchase price			$ 7.0
Number of states in which company facilities are located | State			7
Recovery Monitoring Solutions Corporation
Business Acquisition [Line Items]
Aggregate purchase price		$ 15.9
Number of states in which company facilities are located | State		4
Rehabilitation Services Inc
Business Acquisition [Line Items]
Aggregate purchase price	$ 4.4
Number of additional facilities | Facility	2
Number of additional home confinement facilities | Facility	34
Rehabilitation Services Inc | Ghent Residential Reentry Center
Business Acquisition [Line Items]
Number of beds at the center | Bed	36
Rehabilitation Services Inc | James River Residential Reentry Center
Business Acquisition [Line Items]
Number of beds at the center | Bed	84