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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2013
Schedule Of Income Taxes [Line Items]        
Net operating loss carryforward     $ 0  
Capital loss carryforwards     0  
Federal statutory tax rate   35.00%    
Income taxes paid     $ 24,000,000  
Predecessor        
Schedule Of Income Taxes [Line Items]        
Federal statutory tax rate 35.00%     35.00%
Income taxes paid $ 0     $ 4,200,000