Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 49,592	$ 64,740
Investments and marketable securities	364,529	324,140
Accounts receivable, net	169,255	168,732
Inventories, net	116,417	123,357
Deferred income taxes	12,962	13,484
Prepaid expenses and other current assets	17,379	16,410
Total current assets	730,134	710,863
Property and equipment at cost, less accumulated depreciation and amortization	101,054	101,349
Long-term deferred income taxes	2,134	2,602
Goodwill	94,942	94,942
Other intangibles, net	37,288	39,151
Long-term investments and marketable securities	3,443	5,195
Other assets	14,602	13,646
Total assets	983,597	967,748
Current liabilities:
Accounts payable	20,141	23,045
Accrued liabilities	43,932	57,234
Deferred revenue	13,445	13,326
Income taxes payable	2,374	1,609
Total current liabilities	79,892	95,214
Deferred rent	1,245	1,303
Other long-term liabilities	16,096	14,229
Total liabilities	97,233	110,746
Stockholders' equity:
Preferred Stock	0	0
Class A Common Stock	722	722
Additional paid-in capital	140,736	139,523
Treasury stock	(638,596)	(641,438)
Retained earnings	1,392,062	1,368,520
Accumulated other comprehensive loss	(8,560)	(10,325)
Total stockholders' equity	886,364	857,002
Total liabilities and stockholders' equity	$ 983,597	$ 967,748