CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 64,740	$ 36,418
Investments and marketable securities	324,140	182,398
Accounts receivable, net	168,732	155,230
Receivable from buyer	0	27,580
Inventories, net	123,357	133,288
Deferred income taxes	13,484	13,931
Income tax receivable	0	13,111
Prepaid expenses and other current assets	16,410	22,917
Total current assets	710,863	584,873
Property and equipment at cost, less accumulated depreciation and amortization	101,349	97,822
Long-term deferred income taxes	2,602	11,866
Goodwill	94,942	79,703
Other intangibles, net	39,151	12,667
Long-term investments and marketable securities	5,195	107,879
Other assets	13,646	4,196
Total assets	967,748	899,006
Current liabilities:
Accounts payable	23,045	33,273
Accrued liabilities	57,234	64,612
Deferred revenue	13,326	11,089
Income taxes payable	1,609	0
Total current liabilities	95,214	108,974
Deferred rent	1,303	1,592
Other long-term liabilities	14,229	11,515
Total liabilities	110,746	122,081
Stockholders' equity:
Preferred Stock	0	0
Class A Common Stock	722	722
Additional paid-in capital	139,523	131,422
Treasury stock	(641,438)	(596,622)
Retained earnings	1,368,520	1,245,616
Accumulated other comprehensive loss	(10,325)	(4,213)
Total stockholders' equity	857,002	776,925
Total liabilities and stockholders' equity	$ 967,748	$ 899,006