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Share-Based Compensation Plans - Summary of Non-Vested Options (Detail)
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Non-Vested Options  
Options  
Number of shares, outstanding, beginning balance (shares) | shares 1,671,223
Number of shares, granted (shares) | shares 577,230
Number of shares, forfeited (shares) | shares (95,008)
Number of shares, outstanding, ending balance (shares) | shares 2,063,509
Weighted- Average exercise price  
Weighted-average exercise price, outstanding (usd per share), beginning balance | $ / shares $ 25.10
Weighted-average exercise price, granted (usd per share) | $ / shares 19.05
Weighted-average exercise price, forfeited (usd per share) | $ / shares 21.19
Weighted-average exercise price, outstanding (usd per share), ending balance | $ / shares $ 23.85
Vested Options  
Options  
Number of shares, vested (shares) | shares (89,936)
Weighted- Average exercise price  
Weighted-average exercise price, vested (usd per share) | $ / shares $ 19.33