Revenue (Tables)

6 Months Ended

Mar. 31, 2022

Revenue From Contract With Customer [Abstract]

Summary of Rebate Activity

The rebate activity was as follows (in thousands):

	Three Months Ended March 31,						Six Months Ended March 31,
	2022			2021			2022			2021
Beginning balance	$	53,841		$	38,819		$	47,648		$	32,679
Rebate expense		30,402			20,539			46,552			34,212
Rebate payments		(44,097	)		(31,567	)		(54,054	)		(39,100	)
Ending balance	$	40,146		$	27,791		$	40,146		$	27,791