Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 127,524,000	$ 99,590,000
Investment securities	76,768,000	60,395,000	[1]
Cash, cash equivalents and investment securities	204,292,000	159,985,000	[1]
Accounts receivable, net of allowance for doubtful accounts of $1,146 at September 30, 2012 and $1,293 at December 31, 2011	53,010,000	43,571,000	[1]
Inventories	37,587,000	40,423,000	[1]
Prepaid income taxes	7,568,000	5,589,000	[1]
Prepaid expenses and other current assets	5,931,000	6,759,000	[1]
Deferred income taxes	4,220,000	4,081,000	[1]
Total current assets	312,608,000	260,408,000	[1]
PROPERTY AND EQUIPMENT, net	83,641,000	83,048,000	[1]
GOODWILL	1,478,000	1,478,000	[1]
INTANGIBLE ASSETS, net	10,423,000	11,419,000	[1]
DEFERRED INCOME TAXES	4,757,000	4,759,000	[1]
TOTAL ASSETS	412,907,000	361,112,000	[1]
CURRENT LIABILITIES:
Accounts payable	12,165,000	13,251,000	[1]
Accrued liabilities	16,745,000	16,059,000	[1]
Total current liabilities	28,910,000	29,310,000	[1]
DEFERRED INCOME TAXES	7,148,000	7,144,000	[1]
INCOME TAX LIABILITY	3,816,000	4,081,000	[1]
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $1.00 par value Authorized-500 shares; Issued and outstanding - none	0	0	[1]
Common stock, $0.10 par value - Authorized-80,000 shares; Issued 14,855 shares at September 30, 2012 and December 31, 2011, outstanding 14,404 shares at September 30, 2012 and 13,871 shares at December 31, 2011	1,486,000	1,486,000	[1]
Additional paid-in capital	62,255,000	56,796,000	[1]
Treasury stock, at cost - 451 shares at September 30, 2012 and 984 shares at December 31, 2011	(17,009,000)	(35,348,000)	[1]
Retained earnings	329,815,000	300,877,000	[1]
Accumulated other comprehensive loss	(3,514,000)	(3,234,000)	[1]
Total stockholders' equity	373,033,000	320,577,000	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	412,907,000	361,112,000	[1]
Allowance for doubtful accounts	1,146,000	1,293,000
Convertible preferred stock, par value	$ 1.00	$ 1.00
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	$ 0.10	$ 0.10
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	14,855,000	14,855,000
Common stock, shares outstanding	14,404,000	13,871,000
Treasury Stock, shares	451,000	984,000

[1] December 31, 2011 balances were derived from audited consolidated financial statements.