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Components of Income Tax Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Components Of Income Tax Expense Benefit [Line Items]        
Current     $ 17,121 $ 22,528
Deferred   $ 14,234 (2,474) 23,566
Total income tax expense   $ 14,234 $ 14,647 $ 46,094
Predecessor        
Components Of Income Tax Expense Benefit [Line Items]        
Current $ 914      
Deferred 8      
Total income tax expense $ 922