Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Cash flows from operating activities:
Net income	$ 20,985	$ 13,877
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,053	21,046
Stock-based compensation	29,407	18,331
Other non-cash items, net	(5)	361
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	24,025	21,603
Accounts payable and accrued expenses	(9,628)	(12,885)
Accrued compensation and benefits	(27,504)	(40,172)
Deferred revenue	(21,820)	22,055
Accrued income taxes	(21,668)	(14,272)
Other current assets and prepaid expenses	849	(8,575)
Other noncurrent assets and liabilities	6,520	4,146
Net cash provided by operating activities	21,214	25,515
Cash flows from investing activities:
Additions to property and equipment	(30,332)	(6,377)
Purchase of intangible asset	0	(2,500)
Purchases of short- and long-term marketable securities	(6,736)	(4,248)
Proceeds from maturities of short- and long-term marketable securities	7,007	3,740
Acquisitions of businesses, net of cash acquired	(69,556)	0
Settlement of net investment hedges	(1,595)	0
Net cash used in investing activities	(101,212)	(9,385)
Cash flows from financing activities:
Borrowings under credit facility	155,000	50,000
Repayments of borrowings under credit facility	(20,000)	(20,000)
Proceeds (costs) from issuance of common stock	(4,640)	0
Contingent consideration	(1,575)	(3,176)
Payments of withholding taxes in connection with stock-based awards	(33,788)	(33,488)
Net cash provided by (used in) financing activities	94,997	(6,664)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,041	2,598
Net increase in cash, cash equivalents, and restricted cash	17,040	12,064
Cash, cash equivalents, and restricted cash, beginning of period	261,093	281,209
Cash, cash equivalents, and restricted cash, end of period	$ 278,133	$ 293,273