Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income	$ 73,660	$ 28,548
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	10,494	10,834
Stock-based compensation expense	9,254	4,869
Inventory impairments and abandonments	696	2,266
Deferred and other income tax expense	22,587	8,900
Gain on sale of fixed assets	(258)	(195)
Change in allowance for doubtful accounts	(66)	(6)
Equity in income from unconsolidated entities	(424)	(138)
Cash distributions of income from unconsolidated entities	66	56
Loss on extinguishment of debt, net	1,613	0
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	(3,145)	8,555
Decrease in income tax receivable	49	315
Increase in inventory	(54,867)	(6,616)
Increase in other assets	(4,195)	(1,377)
Increase in trade accounts payable	22,892	48
Increase in other liabilities	186	2,897
Net cash provided by operating activities	78,542	58,956
Cash flows from investing activities:
Capital expenditures	(10,319)	(7,510)
Proceeds from sale of fixed assets	308	214
Net cash used in investing activities	(10,011)	(7,296)
Cash flows from financing activities:
Repayment of debt	(25,128)	(1,150)
Repayment of borrowings from credit facility	0	(345,000)
Borrowings from credit facility	0	345,000
Debt issuance costs	(427)	(97)
Repurchase of common stock	0	(3,327)
Tax payments for stock-based compensation awards	(3,044)	(2,674)
Stock option exercises and other financing activities	564	(1,854)
Net cash used in financing activities	(28,035)	(9,102)
Net increase in cash, cash equivalents, and restricted cash	40,496	42,558
Cash, cash equivalents, and restricted cash at beginning of period	342,528	122,794
Cash, cash equivalents, and restricted cash at end of period	$ 383,024	$ 165,352