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Goodwill - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Sep. 30, 2020
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |
Accounts receivable, net |  | $ 54,489,000 |  | $ 54,489,000 |  | $ 40,195,000
Inventories, net |  | 302,979,000 |  | 302,979,000 |  | 298,002,000
Short-term borrowings |  | 35,762,000 |  | 35,762,000 |  | 144,393,000
Accrued expenses |  | 84,536,000 |  | 84,536,000 |  | 52,123,000
Customer deposits |  | 83,357,000 |  | 83,357,000 |  | 31,821,000
Revenue |  | 523,095,000 | $ 308,475,000 | 934,618,000 | $ 612,647,000 |
Estimated income before taxes |  | 51,778,000 | $ 6,703,000 | 82,493,000 | $ 18,991,000 |
Goodwill and other intangible assets, net |  | $ 142,152,000 |  | 142,152,000 |  | $ 84,293,000
SkipperBuds [Member] |  |  |  |  |  |
Schedule Of Goodwill And Other Assets [Line Items] |  |  |  |  |  |
Aggregate purchase price | $ 55,000,000 |  |  |  |  |
Maximum amount of consideration paid under earnout | 9,300,000 |  |  |  |  |
Fair value of contingent consideration | 8,200,000 |  |  |  |  |
Accounts receivable, net | 5,400,000 |  |  |  |  |
Inventories, net | 42,300,000 |  |  |  |  |
Short-term borrowings | 30,500,000 |  |  |  |  |
Accrued expenses | 14,600,000 |  |  |  |  |
Customer deposits | 7,500,000 |  |  |  |  |
Goodwill | 56,363,000 |  |  |  |  |
Other identifiable intangibles | $ 2,000,000.0 |  |  |  |  |
Intangible assets, weighted average useful life | 3 years 3 months 18 days |  |  |  |  |
Revenue |  |  |  | 108,400,000 |  |
Estimated income before taxes |  |  |  | $ 7,900,000 |  |

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