Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 110,408	$ 116,255
Marketable debt securities - current	47,232	20,020
Accounts receivable, net of allowance for doubtful accounts of $345 and $397, respectively	15,215	13,844
Inventories	28,997	24,851
Prepaid expenses	8,098	5,778
Deferred income taxes	4,454	4,443
Other current assets	9,141	6,004
Total current assets	223,545	191,195
Non-current assets:
Marketable debt securities - non-current	35,518	10,042
Property and equipment, net	68,301	43,850
Deferred income taxes	13,694	12,964
Other assets	4,994	4,606
Total assets	346,052	262,657
Current liabilities:
Accounts payable	64,816	50,141
Customer prepayments	15,411	13,529
Compensation and benefits	23,060	29,806
Taxes and withholding	18,087	9,883
Other current liabilities	20,084	15,691
Total current liabilities	141,458	119,050
Non-current liabilities:
Warranty liabilities	1,924	2,714
Other long-term liabilities	14,106	11,502
Total liabilities	157,488	133,266
Shareholders' equity:
Undesignated preferred stock; 5,000 shares authorized, no shares issued and outstanding	0	0
Common Stock, $0.01 par value; 142,500 shares authorized, 56,040 and 56,397 shares issued and outstanding, respectively	560	564
Additional paid-in capital	41,285	47,701
Retained earnings	146,700	81,101
Accumulated other comprehensive income	19	25
Total shareholders' equity	188,564	129,391
Total liabilities and shareholders' equity	$ 346,052	$ 262,657