XML 65 R54.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation Plans - Summary of Transactions of the Company's Stock Option Plans (Detail) - Stock Options Plan [Member]
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Number of Options, Beginning balance | shares 442,893
Exercised, Number of Options | shares (52,870)
Forfeited, Number of Options | shares (17,806)
Outstanding, Number of Options, Ending balance | shares 464,501
Outstanding, Weighted Average Exercise Price, Beginning balance $ 32.49
Exercised, Weighted Average Exercise Price 32.93
Forfeited, Weighted Average Exercise Price 17.98
Outstanding, Weighted Average Exercise Price, Ending balance 28.75
Outstanding, Weighted Average Grant-Date Fair Value 45.31
Exercised, Weighted Average Grant-Date Fair Value 38.15
Forfeited, Weighted Average Grant-Date Fair Value 65.96
Outstanding, Weighted Average Grant-Date Fair Value $ 53.57
Discount [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted, Number of Options | shares 81,596
Granted, Weighted Average Exercise Price $ 0.00
Granted, Weighted Average Grant-Date Fair Value $ 92.37
Market Value [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted, Number of Options | shares 10,688
Granted, Weighted Average Exercise Price $ 99.85
Granted, Weighted Average Grant-Date Fair Value $ 32.73