Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Cash flows from operating activities:
Net income	$ 39,657	$ 35,811
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,100	19,477
Stock-based compensation	12,764	11,893
Excess tax benefits from stock-based awards	(6,802)	(28)
Other non-cash items, net	87	28
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	19,273	16,142
Accounts payable and accrued expenses	(5,947)	(6,215)
Accrued compensation and benefits	(36,915)	(21,743)
Deferred revenue	(10,827)	(3,534)
Accrued and deferred income taxes	7,393	(33,779)
Other current assets and prepaid expenses	814	1,345
Other noncurrent assets and liabilities	(2,355)	(5,761)
Net cash provided by operating activities	36,242	13,636
Cash flows from investing activities:
Additions to property and equipment	(5,774)	(7,393)
Acquisitions of businesses, net of cash acquired	0	(222,423)
Net cash used by investing activities	(5,774)	(229,816)
Cash flows from financing activities:
Borrowings under credit facility	110,000	0
Repayments of borrowings under credit facility	0	(1,875)
Repurchases of common stock	0	(15,792)
Proceeds from issuance of common stock	351	645
Excess tax benefits from stock-based awards	6,802	28
Payments of withholding taxes in connection with vesting of stock-based awards	(19,363)	(9,348)
Net cash provided (used) by financing activities	97,790	(26,342)
Effect of exchange rate changes on cash and cash equivalents	1,206	1,371
Net increase (decrease) in cash and cash equivalents	129,464	(241,151)
Cash and cash equivalents, beginning of period	241,913	489,543
Cash and cash equivalents, end of period	$ 371,377	$ 248,392