Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) Facility Bed	Dec. 31, 2014 USD ($)
Facility Activations Developments And Closures [Line Items]
Design Capacity | Bed	83,500
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	1,600
Date Idled	2010
Net carrying value	$ 18,168	$ 18,748
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	752
Date Idled	2010
Net carrying value	$ 18,654	19,033
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	2,160
Date Idled	2010
Net carrying value	$ 43,741	44,480
Otter Creek Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	656
Date Idled	2012
Net carrying value	$ 23,689	24,089
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	826
Date Idled	2013
Net carrying value	$ 12,757	12,978
Lee Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	816
Date Idled	2015
Net carrying value	$ 11,102	11,365
Total Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity | Facility	6,810
Net carrying value	$ 128,111	$ 130,693