Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 60,214	$ 62,827
Investments and marketable securities	481,706	350,380
Accounts receivable, net	187,543	176,917
Inventories, net	139,621	121,023
Deferred income taxes	19,480	19,810
Income tax receivable	9,813	7,622
Prepaid expenses and other current assets	22,673	15,524
Total current assets	921,050	754,103
Property and equipment at cost, less accumulated depreciation and amortization	113,206	109,588
Goodwill	153,515	155,800
Other intangibles, net	61,032	68,968
Other assets	34,367	31,353
Total assets	1,283,170	1,119,812
Current liabilities:
Accounts payable	46,083	34,688
Accrued liabilities	83,035	61,962
Deferred revenue	18,965	15,506
Income taxes payable	10,131	6,898
Total current liabilities	158,214	119,054
Long-term deferred tax liability	27,387	25,492
Deferred rent	1,796	1,131
Other long-term liabilities	19,024	15,477
Total liabilities	206,421	161,154
Stockholders' equity:
Class A Common Stock	722	722
Additional paid-in capital	153,026	143,295
Treasury stock	(660,294)	(678,456)
Retained earnings	1,586,986	1,502,878
Accumulated other comprehensive loss	(3,691)	(9,781)
Total stockholders' equity	1,076,749	958,658
Total liabilities and stockholders' equity	$ 1,283,170	$ 1,119,812