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Reorganization Items - Additional Information (Detail) - USD ($)
$ in Millions
 1 Months Ended 5 Months Ended
Feb. 10, 2016
Jun. 30, 2016
Reorganization Items [Line Items]    
Cash payment for reorganization items   $ 15.4
Predecessor    
Reorganization Items [Line Items]    
Cash payment for reorganization items $ 7.3