Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands		12 Months Ended
		Dec. 31, 2016 USD ($) Bed	Sep. 30, 2016 Bed	Jun. 10, 2016 Bed	Dec. 31, 2015 USD ($)	Aug. 27, 2015 Bed
Facility Activations Developments And Closures [Line Items]
Design Capacity		89,700		112		600
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity		1,600
Date Idled		2010
Net carrying value | $		$ 17,071			$ 17,961
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity		752
Date Idled		2010
Net carrying value | $		$ 17,542			18,276
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity		2,160
Date Idled		2010
Net carrying value | $		$ 41,539			43,030
Southeast Kentucky Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity	[1]	656
Date Idled	[1]	2012
Net carrying value | $	[1]	$ 22,618			23,270
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity		826
Date Idled		2013
Net carrying value | $		$ 12,135			12,536
Lee Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity		816
Date Idled		2015
Net carrying value | $		$ 10,342			10,840
Kit Carson Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity		1,488	1,488
Date Idled		2016
Net carrying value | $		$ 58,819			60,039
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity		8,298
Net carrying value | $		$ 180,066			$ 185,952

[1] Formerly known as the Otter Creek Correctional Center.