Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income (loss)	$ (96,315)	$ 112,985
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization	89,134	87,520
Stock-based compensation expense	28,698	26,908
Deferred income taxes	174,060	30,680
Other, net	(881)	(459)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(44,995)	(62,681)
Inventories	(137,036)	(100,583)
Prepaid expenses and other assets	359	10,912
Accounts payable	87,070	112,883
Accrued liabilities	(4,214)	(16,496)
Cash provided by operating activities	95,880	201,669
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(97,468)	(86,801)
Purchases of long-term investments	(2,019)	0
Proceeds from sales of property, plant and equipment	3,948	3,935
Cash used in investing activities	(95,539)	(82,866)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Repayments of long-term debt	(3,416)	(43,416)
Proceeds from revolving credit facility borrowings	3,015,200	408,670
Repayments of revolving credit facility borrowings	(2,867,200)	(433,670)
Debt issuance costs	(1,701)	0
Net proceeds from stock issuances	3,890	25,751
Repurchases of common stock	(150,162)	(37,593)
Holdback payment for a prior business combination	0	(2,262)
Cash used in financing activities	(3,389)	(82,520)
Effect of exchange rate changes	1,164	929
Increase (decrease) in cash and cash equivalents	(1,884)	37,212
Cash and cash equivalents at beginning of period	406,661	398,288
Cash and cash equivalents at end of period	404,777	435,500
Cash paid during the period for:
Interest, net of capitalized interest	23,985	17,439
Income taxes, net of refunds	27,434	17,338
Unpaid purchases of property, plant and equipment at the end of period	$ 32,529	$ 44,004