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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
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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

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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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