Annual report pursuant to Section 13 and 15(d)

Stock-based Expense and Employee Benefits - Summary of Time-Based Restricted Share Awards' Activity (Detail)

v3.19.3
Stock-based Expense and Employee Benefits - Summary of Time-Based Restricted Share Awards' Activity (Detail) - Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Number of Shares      
Beginning Balance (in shares) 1,755,988 1,633,501 1,068,706
Granted (in shares) 1,289,866 1,359,578 1,793,257
Vested (in shares) (1,017,367) (953,749) (841,983)
Forfeited/cancelled (in shares) (242,675) (283,342) (386,479)
Ending Balance (in shares) 1,785,812 1,755,988 1,633,501
Weighted-Average price      
Beginning of Period (in dollars per share) $ 30.05 $ 20.78 $ 20.05
Granted (in dollars per share) 53.26 36.25 20.79
Vested (in dollars per share) 31.92 23.73 20.14
Forfeited/cancelled (in dollars per share) 40.70 28.01 20.21
Ending of Period (in dollars per share) $ 44.34 $ 30.05 $ 20.78