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Summary of Stock Option Activity (Detail)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options, Outstanding beginning balance | shares 559,625
Options, Granted | shares 54,471
Options, Exercised | shares (181,289)
Options, Forfeited | shares (21,942)
Options, Expired | shares 0
Options, Outstanding ending balance | shares 410,865
Options, Exercisable | shares 86,340
Weighted-Average Exercise Price, Outstanding beginning balance | $ / shares $ 225.01
Weighted-Average Exercise Price, Granted | $ / shares 344.05
Weighted-Average Exercise Price, Exercised | $ / shares 174.92
Weighted-Average Exercise Price, Forfeited | $ / shares 263.84
Weighted-Average Exercise Price, Expired | $ / shares 0
Weighted-Average Exercise Price, Outstanding ending balance | $ / shares 260.82
Weighted-Average Exercise Price, Exercisable | $ / shares $ 202.25
Weighted-Average Remaining Contractual Term (in years), Outstanding 2 years 6 months 25 days
Weighted-Average Remaining Contractual Term (in years), Exercisable 1 year 6 months 14 days
Aggregate Intrinsic Value, Outstanding | $ $ 68,882
Aggregate Intrinsic Value, Exercisable | $ $ 19,532