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Equity Awards - Stock Options Outstanding (Detail)
12 Months Ended
Mar. 31, 2025
$ / shares
shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Options Outstanding, Number of Shares Outstanding | shares 184,233
Options Outstanding, Weighted-Average Remaining Contractual Life (in years) 5 years 3 months 10 days
Options Outstanding, Weighted-Average Exercise Price $ 95.75
Options Exercisable , Number of Shares Outstanding | shares 162,740
Options Exercisable, Weighted-Average Exercise Price $ 87.22
$59.32 - $81.28 [Member]  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, Lower Range 59.32
Range of Exercise Prices, Upper Range $ 81.28
Options Outstanding, Number of Shares Outstanding | shares 88,060
Options Outstanding, Weighted-Average Remaining Contractual Life (in years) 4 years 6 months 14 days
Options Outstanding, Weighted-Average Exercise Price $ 63.01
Options Exercisable , Number of Shares Outstanding | shares 88,060
Options Exercisable, Weighted-Average Exercise Price $ 63.01
$91.21 - $100.88 [Member]  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, Lower Range 91.21
Range of Exercise Prices, Upper Range $ 100.88
Options Outstanding, Number of Shares Outstanding | shares 32,852
Options Outstanding, Weighted-Average Remaining Contractual Life (in years) 3 years 3 months 7 days
Options Outstanding, Weighted-Average Exercise Price $ 94.95
Options Exercisable , Number of Shares Outstanding | shares 32,852
Options Exercisable, Weighted-Average Exercise Price $ 94.95
$118.27 - $139.25 [Member]  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, Lower Range 118.27
Range of Exercise Prices, Upper Range $ 139.25
Options Outstanding, Number of Shares Outstanding | shares 48,931
Options Outstanding, Weighted-Average Remaining Contractual Life (in years) 7 years 1 month 9 days
Options Outstanding, Weighted-Average Exercise Price $ 126.59
Options Exercisable , Number of Shares Outstanding | shares 35,272
Options Exercisable, Weighted-Average Exercise Price $ 127.06
$143.09 - $261.76 [Member]  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, Lower Range 143.09
Range of Exercise Prices, Upper Range $ 261.76
Options Outstanding, Number of Shares Outstanding | shares 14,390
Options Outstanding, Weighted-Average Remaining Contractual Life (in years) 8 years 1 month 17 days
Options Outstanding, Weighted-Average Exercise Price $ 193.1
Options Exercisable , Number of Shares Outstanding | shares 6,556
Options Exercisable, Weighted-Average Exercise Price $ 159.3