Consolidated Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 146,900,000	$ 99,590,000
Investment securities	79,259,000	60,395,000
Cash, cash equivalents and investment securities	226,159,000	159,985,000
Accounts receivable, net of allowance for doubtful accounts of $998 at December 31, 2012 and $1,293 at December 31, 2011	49,127,000	43,571,000
Inventories	36,333,000	40,423,000
Prepaid income taxes	2,320,000	5,589,000
Prepaid expenses and other current assets	7,271,000	6,759,000
Deferred income taxes	4,293,000	4,081,000
Total current assets	325,503,000	260,408,000
PROPERTY AND EQUIPMENT, net	85,937,000	83,048,000
GOODWILL	1,478,000	1,478,000
INTANGIBLE ASSETS, net	9,952,000	11,419,000
DEFERRED INCOME TAXES	5,642,000	4,759,000
TOTAL ASSETS	428,512,000	361,112,000
CURRENT LIABILITIES:
Accounts payable	11,308,000	13,251,000
Accrued liabilities	17,810,000	16,059,000
Total current liabilities	29,118,000	29,310,000
DEFERRED INCOME TAXES	5,247,000	7,144,000
INCOME TAX LIABILITY	3,290,000	4,081,000
COMMITMENTS AND CONTINGENCIES	0	0
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, 2012 and December 31, 2011, outstanding 14,458 shares at December 31, 2012 and 13,871 shares at December 31, 2011	1,486,000	1,486,000
Additional paid-in capital	63,770,000	56,796,000
Treasury stock, at cost - 397 shares at December 31, 2012 and 984 shares at December 31, 2011	(15,128,000)	(35,348,000)
Retained earnings	342,158,000	300,877,000
Accumulated other comprehensive loss	(1,429,000)	(3,234,000)
Total stockholders' equity	390,857,000	320,577,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	428,512,000	361,112,000
Allowance for doubtful accounts	998,000	1,293,000
Convertible preferred stock, par value	$ 1	$ 1
Convertible preferred stock, authorized shares	500,000	500,000
Convertible preferred stock, issued shares	$ 0	$ 0
Convertible preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.1	$ 0.1
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	14,855,000	14,855,000
Common stock, shares outstanding	14,458,000	13,871,000
Treasury Stock, shares	397,000	984,000