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Employee Benefit Plans - Summary of Activity for the Stock Option Component of the Incentive Plan (Detail)
 12 Months Ended
Dec. 31, 2021
$ / shares
shares
Compensation Related Costs [Abstract]  
Number of options, Outstanding at beginning of the year | shares 774,749
Number of options, Granted during the year | shares 147,200
Number of options, Exercised during the year | shares (130,273)
Number of options, Forfeited or expired during the year | shares (19,025)
Number of options, Outstanding at end of the year | shares 772,651
Number of options, Exercisable at year end | shares 626,451
Weighted average exercise price per share, Outstanding at beginning of the year | $ / shares $ 32.87
Weighted average exercise price per share, Granted during the year | $ / shares 38.78
Weighted average exercise price per share, Exercised during the year | $ / shares 35.51
Weighted average exercise price per share, Forfeited or expired during the year | $ / shares 34.53
Weighted average exercise price per share, Outstanding at end of the year | $ / shares 34.70
Weighted average exercise price per share, Exercisable at year end | $ / shares $ 35.47