Annual report pursuant to Section 13 and 15(d)

Stock-based Expense - Performance-Based Restricted Share Awards Activity (Detail)

v3.6.0.2
Stock-based Expense - Performance-Based Restricted Share Awards Activity (Detail) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Market Based Restricted Stock      
Number of Shares      
Beginning Balance (in shares) 1,015,095 520,000 0
Granted (in shares) 794,025 691,165 520,000
Vested (in shares) (51,250)    
Forfeited/cancelled (in shares) (193,710) (196,070)  
Ending Balance (in shares) 1,564,160 1,015,095 520,000
Weighted-Average price      
Beginning of Period (in dollars per share) $ 11.85 $ 11.26 $ 0.00
Granted (in dollars per share) 13.58 11.59 11.26
Vested (in dollars per share) 12.52    
Forfeited/cancelled (in dollars per share) 11.61 9.39  
Ending of Period (in dollars per share) $ 12.73 $ 11.85 $ 11.26
Performance Based Restricted Stock      
Number of Shares      
Beginning Balance (in shares) 20,000 0 70,000
Granted (in shares)   20,000  
Forfeited/cancelled (in shares) (20,000)   (70,000)
Ending Balance (in shares) 0 20,000 0
Weighted-Average price      
Beginning of Period (in dollars per share) $ 18.79 $ 0.00 $ 18.10
Granted (in dollars per share)   18.79  
Forfeited/cancelled (in dollars per share) 18.79   18.10
Ending of Period (in dollars per share) $ 0.00 $ 18.79 $ 0.00