Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands	Sep. 30, 2021 USD ($) Bed	Dec. 31, 2020 USD ($)
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	1,600
Net Carrying Value | $	$ 14,020	$ 14,646
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	752
Net Carrying Value | $	$ 15,397	15,895
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	2,160
Net Carrying Value | $	$ 37,052	38,346
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	826
Net Carrying Value | $	$ 10,850	11,047
Kit Carson Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	1,488
Net Carrying Value | $	$ 51,405	52,757
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	6,826
Net Carrying Value | $	$ 128,724	$ 132,691