Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income	$ 76,581	$ 57,499
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	58,249	53,443
Stock-based compensation expense	19,619	12,537
Deferred income taxes	13,744	21,624
Other, net	(244)	(22)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	1,119	(60,744)
Inventories	(73,338)	28,833
Prepaid expenses and other assets	2,827	(6,495)
Accounts payable	45,952	79,046
Accrued liabilities	(1,861)	19,588
Cash provided by operating activities	142,648	205,309
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(55,282)	(58,013)
Proceeds from sales of property, plant and equipment	3,827	332
Cash paid for business combinations, net of cash acquired	0	(58,878)
Cash used in investing activities	(51,455)	(116,559)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Repayments of long-term debt	(40,000)	(966)
Proceeds from revolving credit facility borrowings	246,600	1,609,700
Repayments of revolving credit facility borrowings	(271,600)	(1,604,700)
Net proceeds from stock issuances	22,691	5,752
Repurchases of common stock	(13,623)	(103,960)
Holdback payment for a prior business combination	(2,262)	0
Cash used in financing activities	(58,194)	(94,174)
Effect of exchange rate changes	1,240	490
Increase (decrease) in cash and cash equivalents	34,239	(4,934)
Cash and cash equivalents at beginning of period	398,288	412,253
Cash and cash equivalents at end of period	432,527	407,319
Cash paid during the period for:
Interest, net of capitalized interest	9,070	10,028
Income taxes, net of refunds	9,799	16,356
Acquisition-date fair value of non-interest bearing promissory notes issued in conjunction with business combinations (see Note 8)	$ 0	$ 30,105