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Business Combination Purchase Price Allocation (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]    
Goodwill $ 35,001 $ 35,557
Avalon Correctional Services, Inc    
Business Acquisition [Line Items]    
Property and equipment 119,200  
Intangible assets 18,500  
Total identifiable assets 137,700  
Goodwill 19,800  
Total consideration $ 157,500