Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jul. 04, 2015	Jun. 28, 2014
Cash flows from operating activities:
Net income	$ 53,111	$ 121,439
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	63,455	57,299
Stock-based compensation	38,135	37,862
Excess tax benefits from stock-based awards	71	(9,576)
Other non-cash items, net	(53)	(151)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	44,906	14,625
Accounts payable, accrued expenses and other current liabilities	17,433	(3,930)
Accrued compensation and benefits	(27,462)	(24,278)
Deferred revenue	51,393	55,339
Accrued and deferred income taxes	(25,608)	14,545
Other current assets and prepaid expenses	(5,109)	4,125
Other noncurrent assets and liabilities	(17,809)	(13,912)
Net cash provided by operating activities	192,463	253,387
Cash flows from investing activities:
Additions to property and equipment	(20,637)	(16,721)
Purchases of investments	(11,000)	0
Acquisitions of businesses, net of cash acquired	(98,411)	(111,519)
Net cash used by investing activities	(130,048)	(128,240)
Cash flows from financing activities:
Borrowings under credit facility	135,000	474,375
Repayments of borrowings under credit facility	(122,500)	(417,500)
Repurchases of common stock	(49,962)	(99,915)
Proceeds from issuance of common stock	38	801
Excess tax benefits from stock-based awards	(71)	9,576
Credit facility origination costs	0	(4,120)
Payments of withholding taxes in connection with vesting of stock-based awards	(29,117)	(26,749)
Net cash used by financing activities	(66,612)	(63,532)
Effect of exchange rate changes on cash and cash equivalents	(14,397)	645
Net (decrease) increase in cash and cash equivalents	(18,594)	62,260
Cash and cash equivalents, beginning of period	293,654	241,913
Cash and cash equivalents, end of period	275,060	304,173
Supplemental disclosure of non-cash investing activities:
Fair value of contingent consideration recorded for acquisition	$ 3,800	$ 13,993