Related Party Transactions (Details) - USD ($) $ in Thousands		12 Months Ended
Aug. 22, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Related Party Transactions [Abstract]
Due from related parties		$ 32,368	$ 100
Due to related parties		1,000
Chief Executive Officer [Member]
Related Party Transactions [Abstract]
Payments and fees, related party		0	300	$ 700
Affiliated Entities [Member]
Related Party Transactions [Abstract]
Purchase of inventories	$ 400	78,400	60,800	30,800
Expenses incurred		2,300	2,200	2,100
Affiliated Entities and Individuals [Member]
Related Party Transactions [Abstract]
Fees received for goods and services		1,900	4,100	2,900
Payments and fees, related party		$ 200	$ 500	$ 1,000

Amount for accounts payable to related parties.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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