CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Cash flows from operating activities:
Net income	$ 60,817	$ 94,598
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	11,964	12,151
Equity-based compensation	8,045	8,013
Excess tax benefit from equity-based compensation	(1,358)	(1,234)
Loss on sale of property and equipment	147	5
Gain on sale of business	(613)	(68,001)
Deferred income taxes	367	3,899
Changes in assets and liabilities:
Accounts receivable, net	(657)	5,862
Inventories, net	16,599	(4,704)
Other assets	527	(2,319)
Accounts payable	(9,594)	(4,695)
Accrued liabilities	(11,422)	(13,614)
Deferred revenue	1,460	(14,738)
Income taxes	10,714	(4,333)
Other operating activities	(2,341)	(3,402)
Net cash provided by operating activities	84,655	7,488
Cash flows from investing activities:
Purchases of property and equipment	(10,599)	(11,232)
Proceeds from the sale of business	13,790	161,008
Purchase of long-term equity investment	(5,000)	0
Purchases of investments and marketable securities	(313,863)	(573,686)
Maturities of investments and marketable securities	228,105	351,722
Proceeds from sales of investments and marketable securities	95,106	183,485
Net cash provided by investing activities	7,539	111,297
Cash flows from financing activities:
Purchase of treasury stock	(24,645)	(82,388)
Proceeds from exercise of stock options and stock purchase plan purchases	142	8,096
Excess tax benefit from equity-based compensation	1,358	1,234
Net cash used in financing activities	(23,145)	(73,058)
Effect of exchange rate changes on cash	(99)	239
Net increase in cash and cash equivalents	68,950	45,966
Cash balance of discontinued operations at beginning of period	0	1,301
Less: Cash balance of discontinued operations at end of period	0	486
Cash and cash equivalents at beginning of period	36,418	46,175
Cash and cash equivalents at end of period	105,368	92,956
Supplemental disclosures of cash flow information:
Income taxes paid	$ 13,479	$ 52,819