CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 140,175	$ 158,611	$ 220,704
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	14,867	12,198	13,360
Stock-based compensation expense	7,391	7,275	8,478
Inventory impairments and abandonments	1,996	641	2,963
Deferred and other income tax expense	18,910	23,936	53,267
(Gain) loss on disposal of fixed assets	(426)	1,113	(332)
Gain on sale of investment	(8,591)	0	0
Loss (gain) on extinguishment of debt, net	437	546	(309)
Changes in operating assets and liabilities:
Increase in accounts receivable	(19,825)	(9,708)	(10,205)
Decrease in income tax receivable	0	9,987	0
Increase in inventory	(282,061)	(14,749)	(231,445)
Decrease (increase) in other assets	341	(2,784)	(2,761)
Increase in trade accounts payable	10,133	10,615	10,250
(Decrease) increase in other liabilities	(20,892)	(19,624)	17,104
Net cash (used in) provided by operating activities	(137,545)	178,057	81,074
Cash flows from investing activities:
Capital expenditures	(22,353)	(20,334)	(15,048)
Proceeds from sale of fixed assets	428	445	339
Purchases of investment securities	(8,087)	(9,779)	0
Other	0	(2)	0
Net cash used in investing activities	(30,012)	(29,670)	(14,709)
Cash flows from financing activities:
Repayment of debt	(202,195)	(8,998)	(73,900)
Proceeds from issuance of debt	250,000	0	0
Repayment of borrowings from credit facility	(280,000)	0	(195,000)
Borrowings from credit facility	280,000	0	195,000
Debt issuance costs	(5,653)	(2,575)	0
Repurchase of common stock	(12,928)	0	(8,154)
Tax payments for stock-based compensation awards	(5,366)	(2,615)	(6,631)
Stock option exercises	20	262	5
Net cash provided by (used in) financing activities	23,878	(13,926)	(88,680)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(143,679)	134,461	(22,315)
Cash, cash equivalents, and restricted cash at beginning of period	386,289	251,828	274,143
Cash, cash equivalents, and restricted cash at end of period	$ 242,610	$ 386,289	$ 251,828