Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jan. 03, 2015	Dec. 28, 2013
Cash flows from operating activities:
Net income	$ 30,284us-gaap_NetIncomeLoss	$ 39,657us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	21,237	19,100
Stock-based compensation	11,242us-gaap_ShareBasedCompensation	12,764us-gaap_ShareBasedCompensation
Excess tax benefits from stock-based awards	(163)	(6,802)
Other non-cash items, net	(171)us-gaap_OtherNoncashExpense	87us-gaap_OtherNoncashExpense
Changes in operating assets and liabilities:
Accounts receivable	25,800	19,273
Accounts payable, accrued expenses and other current liabilities	(2,777)	(5,947)
Accrued compensation and benefits	(48,141)	(36,915)
Deferred revenue	(8,776)	(10,827)
Accrued and deferred income taxes	(2,953)	7,393
Other current assets and prepaid expenses	(2,108)	814
Other noncurrent assets and liabilities	(9,842)	(2,355)
Net cash provided by operating activities	13,632	36,242
Cash flows from investing activities:
Additions to property and equipment	(7,947)	(5,774)
Purchases of investments	(1,000)us-gaap_PaymentsToAcquireInvestments	0us-gaap_PaymentsToAcquireInvestments
Acquisitions of businesses	180us-gaap_CashAcquiredFromAcquisition	0us-gaap_CashAcquiredFromAcquisition
Net cash used by investing activities	(8,767)	(5,774)
Cash flows from financing activities:
Borrowings under credit facility	35,000us-gaap_ProceedsFromLinesOfCredit	110,000us-gaap_ProceedsFromLinesOfCredit
Repayments of borrowings under credit facility	(41,250)us-gaap_RepaymentsOfLinesOfCredit	0us-gaap_RepaymentsOfLinesOfCredit
Proceeds from issuance of common stock	3	351
Excess tax benefits from stock-based awards	163	6,802
Payments of withholding taxes in connection with vesting of stock-based awards	(21,669)	(19,363)
Net cash (used) provided by financing activities	(27,753)	97,790
Effect of exchange rate changes on cash and cash equivalents	(9,714)	1,206
Net (decrease) increase in cash and cash equivalents	(32,602)	129,464
Cash and cash equivalents, beginning of period	293,654	241,913
Cash and cash equivalents, end of period	$ 261,052	$ 371,377

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