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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 |

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