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Business Combination Purchase Price Allocation (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill $ 43,996   $ 40,927
Rocky Mountain Offender Management Systems, LLC      
Business Acquisition [Line Items]      
Property and equipment   $ 800  
Intangible assets   3,100  
Total identifiable assets and liabilities   3,900  
Goodwill   3,100  
Total consideration   $ 7,000