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Schedule of Earnings Per Share (Detail) - shares | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Earnings Per Share [Abstract] |  |  |
Weighted-Average Shares of Common Stock Outstanding | 36,798,354 | 40,547,048 | 41,543,067
Assumed Exercise of Outstanding Dilutive Options | 418,659 | 539,309 | 570,325
Less Shares Repurchased from Proceeds of Assumed Exercised Options | (290,590) | (343,917) | (429,815)
Restricted Stock Units | 126,519 | 187,272 | 143,132
Weighted-Average Common Stock and Dilutive Securities Outstanding | 37,052,942 | 40,929,712 | 41,826,709

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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 54 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2603-109256 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 44 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2062-109256 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 26 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1828-109256 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2600-109256 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 52 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2597-109256 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 48 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2538-109256 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 48 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2538-109256 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 23 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1757-109256 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 51 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e2574-109256 + Details
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