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Stock Option Activity (Detail)
 3 Months Ended
Jun. 30, 2023
$ / shares
shares
Share-Based Payment Arrangement [Abstract]  
Number of Shares, Outstanding Options at March 31, 2023 | shares 436,949
Number of Shares, Granted | shares 4,210
Number of Shares, Exercised | shares (117,715)
Number of Shares, Cancelled | shares (1,000)
Number of Shares, Outstanding Options at June 30, 2023 | shares 322,444
Number of Shares, Options Exercisable at June 30, 2023 | shares 228,808
Weighted-Average Exercise Price, Outstanding Options at March 31, 2023 | $ / shares $ 89.69
Weighted-Average Exercise Price, Granted | $ / shares 166.75
Weighted-Average Exercise Price, Exercised | $ / shares 166.25
Weighted-Average Exercise Price, Cancelled | $ / shares 73.37
Weighted-Average Exercise Price, Outstanding Options at June 30, 2023 | $ / shares 91.28
Weighted Average Fair Value of Options Granted During the Year | $ / shares $ 67.01