Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Receivable allowances	$ 885	$ 856
Reserves and accruals	24,913	24,141
Inventory valuation and other assets	3,141	4,617
Investment in partnership	1,977	1,592
Unrealized foreign exchange gains (losses), including related hedges	4,468	5,332
Other deferred taxes	2,811	3,474
Net operating loss carryforwards	48,605	29,407
Gross deferred tax assets	86,800	69,419
Less: Valuation allowance	(21,299)	(23,298)
Deferred Tax Assets, Net of Valuation Allowance	65,501	46,121
Goodwill	(9,849)	(6,579)
Fixed assets	(46,057)	(32,136)
Intangibles	(15,313)	(15,509)
Other deferred tax liabilities	(2,440)	(1,427)
Gross deferred tax liabilities	(73,659)	(55,651)
Net deferred tax liabilities	$ (8,158)	$ (9,530)