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Stock Option and Incentive Plan - Assumptions Used in Calculating Fair Value of Options (Parenthetical) (Detail) shares in Thousands | 12 Months Ended
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Sep. 30, 2022 shares
Disclosure of Stock Option and Incentive Plan [Abstract] |
Stock options granted | 0

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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