Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 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 | $	$ 14,863	$ 15,278
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	752
Date Idled	2010
Net Carrying Value | $	$ 16,266	16,660
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	2,160
Date Idled	2010
Net Carrying Value | $	$ 39,729	40,962
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	826
Date Idled	2013
Net Carrying Value | $	$ 11,351	11,770
Kit Carson Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	1,488
Date Idled	2016
Net Carrying Value | $	$ 54,041	55,507
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	6,826
Net Carrying Value | $	$ 136,250	$ 140,177