CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
Cash flows from operating activities:
Net income	$ 87,914	$ 139,599
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	18,906	17,985
Equity-based compensation	11,485	11,060
Asset impairment charge	9,114	0
Impairment of investments	0	326
Excess tax benefit from equity-based compensation	(1,492)	(1,265)
Loss on sale of property and equipment	178	53
Gain on sale of business	(613)	(66,753)
Deferred income taxes	2,755	5,703
Changes in assets and liabilities:
Accounts receivable, net	(6,108)	(10,112)
Inventories, net	11,981	(6,635)
Other assets	12,070	(10,150)
Accounts payable	(10,843)	(8,493)
Accrued liabilities	(11,341)	(14,917)
Deferred revenue	2,644	(16,707)
Income taxes	14,711	(7,087)
Other operating activities	(6,378)	2,116
Net cash provided by operating activities	134,983	34,723
Cash flows from investing activities:
Purchases of property and equipment	(17,140)	(17,829)
Proceeds from the sale of business	27,580	161,206
Acquisition of business, net of cash acquired	(59,874)	0
Acquisition of intangible assets	(3,000)	(200)
Purchase of long-term equity investment	(5,000)	0
Purchases of investments and marketable securities	(483,349)	(791,811)
Maturities of investments and marketable securities	324,139	493,649
Proceeds from sales of investments and marketable securities	133,863	253,377
Net cash provided by (used in) investing activities	(82,781)	98,392
Cash flows from financing activities:
Purchase of treasury stock	(39,697)	(146,373)
Proceeds from exercise of stock options and stock purchase plan purchases	1,909	9,197
Excess tax benefit from equity-based compensation	1,492	1,265
Net cash used in financing activities	(36,296)	(135,911)
Effect of exchange rate changes on cash	(71)	(899)
Net increase in cash and cash equivalents	15,835	(3,695)
Cash balance of discontinued operations at beginning of period	0	1,301
Less: Cash balance of discontinued operations at end of period	0	0
Cash and cash equivalents at beginning of period	36,418	46,175
Cash and cash equivalents at end of period	52,253	43,781
Supplemental disclosures of cash flow information:
Income taxes paid	$ 16,773	$ 53,512