Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash flows from operating activities:
Net income	$ 107,203	$ 72,253
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,399	19,958
Amortization of intangible assets	30,429	28,851
Gain on business combination	0	(5,416)
Deferred income taxes	14,079	(5,620)
Amortization of debt issuance cost	7,221	1,707
Stock-based compensation	15,486	12,186
Non-cash restructuring charges	439	4,313
Other non-cash expense	92	567
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable	5,785	(2,798)
Inventories	(59,678)	4,962
Prepaid expenses and other assets	(5,193)	(3,634)
Other long-term assets	(3,753)	(2,292)
Accounts payable	13,587	8,672
Income taxes payable/receivable	20,815	12,854
Other current liabilities	(41,575)	47,046
Other long-term liabilities	2,463	2,051
Cash flows from discontinued operations	0	(1,301)
Net cash provided by operating activities	132,799	194,359
Cash flows from investing activities:
Purchases of property and equipment	(44,951)	(29,543)
Proceeds from dispositions of property and equipment	90	144
Purchases of available-for-sale securities	(32,838)	0
Proceeds from sales and maturities of available-for-sale securities	28,197	25,108
Acquisition of businesses, net of cash acquired	(45,448)	(740,481)
Other	470	0
Proceeds from sale of discontinued operation	25,000	0
Cash flows from discontinued operations	0	(316)
Net cash used in investing activities	(69,480)	(745,088)
Cash flows from financing activities:
Short-term borrowings	36,672	6,930
Repayments of short-term borrowings	(36,955)	(28,700)
Proceeds from long-term borrowings	0	740,685
Repayments of long-term borrowings	(166,913)	(36,349)
Cash paid to subsidiaries' minority shareholders	0	(816)
Issuance of common stock under employee stock option and purchase plans	4,899	3,866
Net settlement of restricted common stock	(36,250)	(15,675)
Debt issuance costs	0	(25,892)
Net cash provided by (used in) financing activities	(198,547)	644,049
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,704	(1,617)
Net increase (decrease) in cash, cash equivalents and restricted cash	(133,524)	91,703
Cash, cash equivalents and restricted cash, beginning of period	457,087	354,347
Cash, cash equivalents and restricted cash, end of period	323,563	446,050
Non-cash investing and financing activities:
Unpaid property and equipment purchases	3,362	2,722
Use of previously owned equity shares in acquisition	0	20,685
Condensed consolidated statements of cash flows
Cash, cash equivalents and restricted cash, end of period	$ 457,087	$ 354,347