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Goodwill - Additional Information (Detail) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
May 31, 2021 USD ($) | Oct. 31, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) Segment | Jun. 30, 2020 USD ($) | Sep. 30, 2020 USD ($)
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  |  | $ 60,195 |  | $ 60,195 |  | $ 40,195
Inventories, net |  |  | 209,418 |  | 209,418 |  | 298,002
Short-term borrowings |  |  | 2,861 |  | 2,861 |  | 144,393
Accrued expenses |  |  | 89,696 |  | 89,696 |  | 52,123
Accounts payable |  |  | 28,741 |  | 28,741 |  | 37,343
Customer deposits |  |  | 86,704 |  | 86,704 |  | 31,821
Goodwill |  |  | 181,017 |  | 181,017 |  | 84,240
Revenue |  |  | 666,328 | $ 498,304 | 1,600,947 | $ 1,110,951 |
Estimated income before taxes |  |  | 80,269 | $ 46,482 | 162,762 | $ 65,473 |
Goodwill and other intangible assets, net |  |  | $ 186,691 |  | $ 186,691 |  | $ 84,293
Number of reportable segments | Segment |  |  |  |  | 2 |  |
Cruisers Yachts [Member] |  |  |  |  |  |  |
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |  |
Aggregate purchase price | $ 62,700 |  |  |  |  |  |
Accounts receivable, net | 3,100 |  |  |  |  |  |
Inventories, net | 26,200 |  |  |  |  |  |
Short-term borrowings | 11,700 |  |  |  |  |  |
Accrued expenses | 10,300 |  |  |  |  |  |
Accounts payable | 3,000 |  |  |  |  |  |
Goodwill | $ 40,134 |  |  |  |  |  |
Cruisers Yachts [Member] | Customer Relationships [Member] |  |  |  |  |  |  |
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |  |
Weighted average useful life | 2 years |  |  |  |  |  |
SkipperBuds [Member] |  |  |  |  |  |  |
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |  |
Aggregate purchase price |  | $ 55,000 |  |  |  |  |
Accounts receivable, net |  | 5,400 |  |  |  |  |
Inventories, net |  | 42,300 |  |  |  |  |
Short-term borrowings |  | 30,500 |  |  |  |  |
Accrued expenses |  | $ 14,600 |  |  |  |  |
Weighted average useful life |  | 3 years 3 months 18 days |  |  |  |  |
Maximum amount of consideration paid under earnout |  | $ 9,300 |  |  |  |  |
Fair value of contingent consideration |  | 8,200 |  |  |  |  |
Customer deposits |  | 7,500 |  |  |  |  |
Goodwill |  | 56,363 |  |  |  |  |
Other identifiable intangibles |  | $ 2,000 |  |  |  |  |
Revenue |  |  |  |  | $ 230,100 |  |
Estimated income before taxes |  |  |  |  | $ 25,300 |  |

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