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Common Stock and Stock Plans - Summary of Stock Option Activity and TSR Performance Stock Option Activity (Detail)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
shares
Employee Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding, Beginning Balance | shares 1,225,233
Number of Shares, Options granted | shares 34,000
Number of Shares, Options expired | shares (302,500)
Number of Shares, Outstanding, Ending Balance | shares 956,733
Number of Shares, Vested and exercisable, Ending Balance | shares 916,733
Weighted Average Exercise Price per Share, Outstanding, Beginning Balance | $ / shares $ 65.96
Weighted Average Exercise Price per Share, Options granted | $ / shares 40.25
Weighted Average Exercise Price per Share, Options expired | $ / shares 65.54
Weighted Average Exercise Price per Share, Outstanding, Ending Balance | $ / shares 65.18
Weighted Average Exercise Price per Share, Vested and exercisable, Ending Balance | $ / shares $ 66.11
Weighted Average Remaining Contractual Term in Years, Outstanding 1 year 6 months
Weighted Average Remaining Contractual Term in Years, Vested and exercisable 1 year 4 months 24 days
Aggregate Intrinsic Value, Outstanding | $ $ 266
TSR Performance Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Outstanding, Beginning Balance | shares 1,630,806
Number of Shares, Options granted | shares 784,653
Number of Shares, Outstanding, Ending Balance | shares 2,415,459
Weighted Average Exercise Price per Share, Outstanding, Beginning Balance | $ / shares $ 71.52
Weighted Average Exercise Price per Share, Options granted | $ / shares 35.66
Weighted Average Exercise Price per Share, Outstanding, Ending Balance | $ / shares $ 59.87
Weighted Average Remaining Contractual Term in Years, Outstanding 4 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding | $ $ 9,738