Idled Facilities and Respective Carrying Values Excluding Equipment and Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Facility	Dec. 31, 2014
Facility Activations Developments And Closures [Line Items]
Design Capacity	81,500
Prairie Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity	1,600
Date Idled	2010
Net Carrying Value	$ 18,459	$ 18,748
Huerfano County Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	752
Date Idled	2010
Net Carrying Value	18,844	19,033
Diamondback Correctional Facility
Facility Activations Developments And Closures [Line Items]
Design Capacity	2,160
Date Idled	2010
Net Carrying Value	44,113	44,480
Otter Creek Correctional Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	656
Date Idled	2012
Net Carrying Value	23,881	24,089
Marion Adjustment Center
Facility Activations Developments And Closures [Line Items]
Design Capacity	826
Date Idled	2013
Net Carrying Value	12,868	12,978
Total Idle Facilities
Facility Activations Developments And Closures [Line Items]
Design Capacity	5,994
Net Carrying Value	$ 118,165	$ 119,328