CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 62,827	$ 64,740
Investments and marketable securities	350,380	324,140
Accounts receivable, net	176,917	168,732
Inventories, net	121,023	123,357
Deferred income taxes	19,810	13,484
Income tax receivable	7,622	0
Prepaid expenses and other current assets	15,524	16,410
Total current assets	754,103	710,863
Property and equipment at cost, less accumulated depreciation and amortization	109,588	101,349
Long-term deferred income taxes	0	2,602
Goodwill	155,800	94,942
Other intangibles, net	68,968	39,151
Long-term investments and marketable securities	2,588	5,195
Other assets	28,765	13,646
Total assets	1,119,812	967,748
Current liabilities:
Accounts payable	34,688	23,045
Accrued liabilities	61,962	57,234
Deferred revenue	15,506	13,326
Income taxes payable	6,898	1,609
Total current liabilities	119,054	95,214
Long-term deferred tax liability	25,492	0
Deferred rent	1,131	1,303
Other long-term liabilities	15,477	14,229
Total liabilities	161,154	110,746
Stockholders' equity:
Class A Common Stock	722	722
Additional paid-in capital	143,295	139,523
Treasury stock	(678,456)	(641,438)
Retained earnings	1,502,878	1,368,520
Accumulated other comprehensive loss	(9,781)	(10,325)
Total stockholders' equity	958,658	857,002
Total liabilities and stockholders' equity	$ 1,119,812	$ 967,748