Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Stock-based Compensation - Performance-Based Restricted Share Awards Activity (Detail) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Market Based Restricted Stock      
Number of Shares      
Beginning Balance (in shares) 520,000 0  
Granted (in shares) 691,165 520,000  
Vested (in shares) 0 0  
Forfeited/cancelled (in shares) (196,070) 0  
Ending Balance (in shares) 1,015,095 520,000 0
Weighted-Average price      
Beginning of Period (in dollars per share) $ 11.26 $ 0.00  
Granted (in dollars per share) 11.59 11.26  
Vested (in dollars per share) 0.00 0.00  
Forfeited/cancelled (in dollars per share) 9.39 0.00  
Ending of Period (in dollars per share) $ 11.85 $ 11.26 $ 0.00
Performance Based Restricted Stock      
Number of Shares      
Beginning Balance (in shares) 0 70,000 275,257
Granted (in shares) 20,000 0 100,000
Vested (in shares) 0 0 (31,902)
Forfeited/cancelled (in shares) 0 (70,000) (273,355)
Ending Balance (in shares) 20,000 0 70,000
Weighted-Average price      
Beginning of Period (in dollars per share) $ 0.00 $ 18.10 $ 22.46
Granted (in dollars per share) 18.79 0.00 21.60
Vested (in dollars per share) 0.00 0.00 17.99
Forfeited/cancelled (in dollars per share) 0.00 18.10 23.40
Ending of Period (in dollars per share) $ 18.79 $ 0.00 $ 18.10