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Summary of Stock Option Activity (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
shares
Mar. 31, 2021
$ / shares
shares
Options    
Outstanding at beginning of period | shares 711  
Granted | shares 66  
Exercised | shares (155)  
Cancelled and expired | shares (14)  
Outstanding at end of period | shares 608 711
Exercisable at end of period | shares 462  
Options vested and expected to vest at end of period | shares 608  
Weighted Average Exercise Price    
Outstanding at beginning of period | $ / shares $ 141.87  
Granted | $ / shares 289.01  
Exercised | $ / shares 56.98  
Cancelled and expired | $ / shares 314.28  
Outstanding at end of period | $ / shares 175.36 $ 141.87
Exercisable at end of period | $ / shares 147.90  
Options vested and expected to vest at end of period | $ / shares $ 175.36  
Weighted Average Remaining Contractual Term (years)    
Outstanding 5 years 8 months 19 days 5 years 5 months 15 days
Exercisable at end of period 4 years 9 months 21 days  
Options vested and expected to vest at end of period 5 years 8 months 19 days  
Aggregate Intrinsic Value    
Outstanding at end of period | $ $ 113,080  
Exercisable at end of period | $ 99,031  
Options vested and expected to vest at end of period | $ $ 113,080