Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net income (loss)	$ (9,563)	$ 52,525
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation	42,018	31,680
Amortization of intangibles	23,457	25,444
Non-cash interest expense	824	2,373
Non-cash lease expense	(122)	(68)
Deferred income tax (benefit) provision	465	15,132
Non-cash compensation expense	12,678	11,773
Fair value adjustment for contingent consideration	400
Loss on disposition of property, plant and equipment	183	425
Changes in certain assets and liabilities:
Trade receivables	(62,586)	(90,571)
Inventories	48,880	(98,616)
Prepaid expenses and other currents assets	(18,310)	(8,677)
Accounts payable	15,702	12,213
Accrued expenses and interest	7,530	(22,294)
Other assets and liabilities	1,586	1,118
Net cash provided by (used in) operating activities	63,142	(67,543)
Investing activities:
Purchases of property, plant and equipment	(47,284)	(113,995)
Proceeds from disposition of fixed assets	99	497
Acquisitions, net of cash acquired	(161)	(86,935)
Net cash used in investing activities	(47,346)	(200,433)
Financing activities:
Payments on 2022 Term Loan Agreement	(3,000)
Proceeds under revolving credit facility	25,000	40,000
Payments under revolving credit facility	(25,000)
Repayments of finance lease obligations	(1,307)	(1,242)
Exercise of vested stock options	1,901	4,923
Cash paid for shares withheld for taxes	(460)	(429)
Purchases of treasury stock	(7,488)
Net cash provided by (used in) financing activities	(10,354)	43,252
Net increase (decrease) in cash and cash equivalents	5,442	(224,724)
Cash and cash equivalents – Beginning of period	120,817	250,536
Cash and cash equivalents – End of period	126,259	25,812
Supplemental cash flow disclosure:
Cash paid for interest, net of amounts capitalized	23,611	5,792
Cash paid for income taxes, net	14,959	5,484
Supplemental non-cash investing and financing disclosure:
Capital expenditures in accounts payable at end of period	12,984	11,976
Right-of-use operating and finance lease assets obtained in exchange for lease liabilities	$ 2,439	$ 10,208