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Share-Based Compensation - Summary of Nonvested Restricted Stock Activity and Related Information (Detail)
shares in Thousands
3 Months Ended
Mar. 31, 2022
$ / shares
shares
Shares  
Non-vested restricted stock outstanding at end of period (in shares) 500
Restricted Shares  
Shares  
Non-vested restricted stock outstanding at beginning of period (in shares) 413
Granted (in shares) 179
Vested (in shares) (107)
Forfeited (in shares) (10)
Non-vested restricted stock outstanding at end of period (in shares) 475
Weighted Average  Grant Date Fair Value  
Non-vested restricted stock outstanding at beginning of period (in usd per share) | $ / shares $ 96.07
Granted (in usd per share) | $ / shares 134.71
Vested (in usd per share) | $ / shares 86.05
Forfeited (in usd per share) | $ / shares 100.34
Non-vested restricted stock outstanding at end of period (in usd per share) | $ / shares $ 112.85
Performance Restricted Stock Units  
Shares  
Non-vested restricted stock outstanding at beginning of period (in shares) 289
Granted (in shares) 87
Performance assumption change (in shares) 66
Vested (in shares) (161)
Forfeited (in shares) (2)
Non-vested restricted stock outstanding at end of period (in shares) 279
Weighted Average  Grant Date Fair Value  
Non-vested restricted stock outstanding at beginning of period (in usd per share) | $ / shares $ 85.29
Granted (in usd per share) | $ / shares 134.69
Performance assumption change (in usd per share) | $ / shares 81.76
Vested (in usd per share) | $ / shares 81.76
Forfeited (in usd per share) | $ / shares 89.73
Non-vested restricted stock outstanding at end of period (in usd per share) | $ / shares $ 101.97