Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Cash flows from operating activities:
Net income	$ 35,455	$ 20,985
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,588	20,053
Stock-based compensation	27,936	29,407
Other non-cash items, net	(1,223)	(5)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	34,314	24,025
Accounts payable and accrued expenses	(11,959)	(9,628)
Accrued compensation and benefits	(3,563)	(27,504)
Deferred revenue	(34,952)	(21,820)
Accrued income taxes	(42,702)	(21,668)
Other current assets and prepaid expenses	1,680	849
Other noncurrent assets and liabilities	(17,062)	6,520
Net cash provided by operating activities	7,512	21,214
Cash flows from investing activities:
Additions to property and equipment	(4,707)	(30,332)
Purchases of short- and long-term marketable securities	(5,592)	(6,736)
Proceeds from maturities of short- and long-term marketable securities	5,499	7,007
Acquisitions of businesses, net of cash acquired	(467,749)	(69,556)
Settlement of net investment hedges	(870)	(1,595)
Net cash used in investing activities	(473,419)	(101,212)
Cash flows from financing activities:
Borrowings under credit facility	455,000	155,000
Repayments of borrowings under credit facility	0	(20,000)
Proceeds (costs) from issuance of common stock	0	(4,640)
Credit facility origination costs	(1,005)	0
Contingent consideration	0	(1,575)
Payments of withholding taxes in connection with stock-based awards	(22,849)	(33,788)
Net cash provided by financing activities	431,146	94,997
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,991	2,041
Net change in cash, cash equivalents, and restricted cash	(32,770)	17,040
Cash, cash equivalents, and restricted cash, beginning of period	270,689	261,093
Cash, cash equivalents, and restricted cash, end of period	$ 237,919	$ 278,133