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Business Combination Purchase Price Allocation (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Aug. 27, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Property and equipment   $ 13,400  
Goodwill $ 35,557   $ 16,110
Avalon Correctional Services, Inc      
Business Acquisition [Line Items]      
Property and equipment 119,200    
Intangible assets 17,900    
Total identifiable assets 137,100    
Goodwill 20,400    
Total consideration $ 157,500