Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) Bed	Dec. 31, 2018 USD ($)
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	1,600
Date Idled	2010
Net Carrying Value | $	$ 14,830	$ 15,278
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	752
Date Idled	2010
Net Carrying Value | $	$ 16,340	16,660
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	2,160
Date Idled	2010
Net Carrying Value | $	$ 40,588	40,962
Southeast Kentucky Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	656
Date Idled	2012
Net Carrying Value | $	$ 20,677	21,098
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	826
Date Idled	2013
Net Carrying Value | $	$ 11,564	11,770
Kit Carson Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	1,488
Date Idled	2016
Net Carrying Value | $	$ 54,626	55,507
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	7,482
Net Carrying Value | $	$ 158,625	$ 161,275