Annual report pursuant to Section 13 and 15(d)

Activity of Awarded Options (Detail)

v3.6.0.2
Activity of Awarded Options (Detail) - USD ($)
8 Months Ended 12 Months Ended
Sep. 12, 2016
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Cancelled $ (3,083,821)    
Share-based Compensation Arrangement by Share-by Payment Awards, Options, Weighted Average Price of Shares Canceled $ 16.05    
Shares Under Options      
Outstanding at beginning of year (in shares) 3,083,821 3,083,821  
Granted (in shares)   0  
Exercised (in shares)   0  
Forfeited (in shares)   0  
Outstanding at end of year (in shares)   0 3,083,821
Exercisable at end of year (in shares)   0  
Weighted- Average Exercise Price      
Outstanding at beginning of year (in dollars per share) $ 16.05 $ 16.05  
Granted (in dollars per share)   0.00  
Exercised (in dollars per share)   0.00  
Forfeited (in dollars per share)   0.00  
Outstanding at end of year (in dollars per share)   0.00 $ 16.05
Exercisable at end of year (in dollars per share)   $ 0.00  
Aggregate Intrinsic Value      
Balance as of December 31, 2016 (Successor)   $ 0  
Exercisable as of end of year (Successor)   $ 0  
Non-employee Director | Common Stock [Member]      
Shares Under Options      
Exercised (in shares)   0 0