Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 41,901	$ 30,408
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,555	8,995
Amortization of intangible assets	15,100	12,088
Gain on business combination	0	(5,416)
Deferred income taxes	13,121	1,291
Amortization of debt issuance cost	3,815	600
Stock-based compensation	7,076	5,503
Non-cash restructuring charges	430	4,359
Other non-cash expense	377	456
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable	(1,219)	4,417
Inventories	(16,128)	6,613
Prepaid expenses and other assets	(6,364)	(3,559)
Other long-term assets	(3,365)	(1,083)
Accounts payable	4,676	1,439
Income taxes payable/receivable	29,751	(1,428)
Other current liabilities	(39,336)	17,911
Other long-term liabilities	2,588	1,330
Cash flows from discontinued operations	2	(1,283)
Net cash provided by operating activities	64,980	82,641
Cash flows from investing activities:
Purchases of property and equipment	(23,683)	(15,390)
Proceeds from dispositions of property and equipment	26	123
Purchases of available-for-sale securities	(14,894)	0
Proceeds from sales and maturities of available-for-sale securities	9,711	25,108
Acquisition of businesses, net of cash acquired	0	(740,481)
Proceeds from sale of discontinued operation	25,000	0
Cash flows from discontinued operations	0	(153)
Net cash used in investing activities	(3,840)	(730,793)
Cash flows from financing activities:
Short-term borrowings	2,354	3,920
Repayments of short-term borrowings	(622)	(23,920)
Proceeds from long-term borrowings	0	740,685
Repayments of long-term borrowings	(90,363)	(2,171)
Issuance of common stock under employee stock option and purchase plans	4,899	3,866
Net settlement of restricted common stock	(35,646)	(15,255)
Debt issuance costs	0	(25,824)
Net cash provided by (used in) financing activities	(119,378)	681,301
Effect of exchange rate changes on cash, cash equivalents and restricted cash	943	(13,504)
Net increase (decrease) in cash, cash equivalents and restricted cash	(57,295)	19,645
Cash, cash equivalents and restricted cash, beginning of period	457,087	354,347
Cash, cash equivalents and restricted cash, end of period	399,792	373,992
Non-cash investing and financing activities:
Unpaid property and equipment purchases	3,853	4,084
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