Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash Flows from Operating Activities:
Net earnings	$ 100,223	$ 67,634
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	50,924	55,017
Share-based compensation expense	10,291	9,082
Amortization of deferred financing costs	1,092	1,272
Loss on early extinguishment of debt	759	2,037
Impairment of long-lived assets	1,779
Loss (gain) on disposal of equipment and other property	(26,641)	3
Deferred income taxes	(4,581)	171
Changes in (exclusive of effects of acquisitions):
Trade accounts receivable	5,779	(1,054)
Accounts receivable, other	(9,751)	(10,141)
Inventory	20,759	(59,741)
Other current assets	6,138	(1,412)
Other assets	666	(1,792)
Operating leases, net	(509)	(2,072)
Accounts payable and accrued liabilities	(57,761)	32,314
Income taxes payable	(13,583)	(1,842)
Other liabilities	(1,063)	(1,516)
Net cash provided by operating activities	84,521	87,960
Cash Flows from Investing Activities:
Payments for property and equipment	(38,971)	(44,659)
Proceeds from sale of property and equipment, net	43,574
Acquisitions, net of cash acquired	(371)	(218)
Net cash provided (used) by investing activities	4,232	(44,877)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt and ABL facility	351,000	1,056,000
Repayments of long-term debt and ABL facility	(428,079)	(1,076,054)
Debt issuance costs	(1,525)	(8,332)
Proceeds from equity awards	403	1,614
Payments for common stock repurchased	(20,187)	(40,400)
Employee withholding taxes paid related to net share settlement of equity awards	(5,271)	(1,760)
Net cash used by financing activities	(103,659)	(68,932)
Effect of foreign exchange rate changes on cash and cash equivalents	(881)	22
Net decrease in cash and cash equivalents	(15,787)	(25,827)
Cash and cash equivalents, beginning of period	107,961	123,001
Cash and cash equivalents, end of period	92,174	97,174
Supplemental Cash Flow Information:
Interest paid	33,344	48,253
Income taxes paid	55,815	32,007
Capital expenditures incurred but not paid	$ 6,999	$ 16,992