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Goodwill Other Intangible Assets and Other Long Term Assets - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed at Acquisition Date (Parenthetical) (Detail) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2022 | May 31, 2021 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Business Acquisition [Line Items] |  |  |  |  |
Cash purchase price and net working capital adjustments, net of cash acquired |  |  | $ 516,794 | $ 83,198 | $ 134,205
IGY Marinas [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Current assets and net working capital, net of cash acquired | $ 28,075 |  |  |  |
Cash purchase price and net working capital adjustments, net of cash acquired | $ 28,075 |  |  |  |
Cruisers Yachts [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Current assets and net working capital, net of cash acquired |  | $ 5,993 |  |  |
Cash purchase price and net working capital adjustments, net of cash acquired |  | $ 5,993 |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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