Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) Bed	Aug. 27, 2015 Bed	Jun. 30, 2015 Bed	Dec. 31, 2014 USD ($)
Facility Activations Developments And Closures [Line Items]
Design Capacity	83,000	600
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity	1,600
Date Idled	2010
Net carrying value | $	$ 18,126			$ 18,748
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	752
Date Idled	2010
Net carrying value | $	$ 18,464			19,033
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity	2,160
Date Idled	2010
Net carrying value | $	$ 43,404			44,480
Otter Creek Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	656
Date Idled	2012
Net carrying value | $	$ 23,479			24,089
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	826
Date Idled	2013
Net carrying value | $	$ 12,646			12,978
Lee Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	816		816
Date Idled	2015
Net carrying value | $	$ 10,969			11,365
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity	6,810
Net carrying value | $	$ 127,088			$ 130,693