Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 99,590	$ 78,850
Investment securities	60,395	14,507
Cash, cash equivalents and investment securities	159,985	93,357
Accounts receivable, net of allowance for doubtful accounts of $1,293 at December 31, 2011 and $742 at December 31, 2010	43,571	50,941
Inventories	40,423	44,056
Prepaid income taxes	5,589	2,270
Prepaid expenses and other current assets	6,759	9,574
Deferred income taxes	4,081	5,053
Total current assets	260,408	205,251
PROPERTY AND EQUIPMENT, net	83,048	83,545
GOODWILL	1,478	1,478
INTANGIBLE ASSETS, net	11,419	14,806
DEFERRED INCOME TAXES	4,759	4,564
TOTAL ASSETS	361,112	309,644
CURRENT LIABILITIES:
Accounts payable	13,251	10,879
Accrued liabilities	16,059	14,629
Deferred revenue	0	254
Total current liabilities	29,310	25,762
COMMITMENTS AND CONTINGENCIES	0	0
DEFERRED INCOME TAXES	7,144	8,023
INCOME TAX LIABILITY	4,081	4,155
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $1.00 par value Authorized-500 shares; Issued and outstanding - none	0	0
Common stock, $0.10 par value - Authorized-80,000 shares; Issued 14,855 shares at December 31, 2011 and December 31, 2010, outstanding 13,871 shares at December 31, 2011 and 13,659 shares at December 31, 2010	1,486	1,486
Additional paid-in capital	56,796	56,502
Treasury stock, at cost - 984 shares at December 31, 2011 and 1,196 shares at December 31, 2010	(35,348)	(41,428)
Retained earnings	300,877	256,208
Accumulated other comprehensive loss	(3,234)	(1,064)
Total stockholders' equity	320,577	271,704
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 361,112	$ 309,644