Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 73,995	$ 49,719
Marketable securities	59,360	101,005
Accounts receivable	74,995	91,642
Less allowance for doubtful accounts	1,361	527
Accounts receivable, net	73,634	91,115
Inventories:
Finished goods	32,759	37,144
Work in process	50,462	37,040
Raw materials	11,285	8,948
Total inventory	94,506	83,132
Deferred tax assets	6,140	6,268
Other current assets	21,270	14,301
Total current assets	328,905	345,540
PROPERTY, PLANT AND EQUIPMENT:
Land and land improvements	1,955	1,946
Buildings	29,348	25,527
Machinery and equipment	90,305	79,626
Property plant and equipment gross	121,608	107,099
Less allowance for depreciation and amortization	57,340	48,991
PROPERTY, PLANT AND EQUIPMENT, NET	64,268	58,108
GOODWILL	18,468	11,485
Total assets	411,641	415,133
LIABILITIES
Accounts payable	48,344	44,298
Federal and state income taxes	1,567	5,859
Accrued liabilities	16,035	16,572
Total current liabilities	65,946	66,729
DEFERRED INCOME TAXES	9,405	4,467
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized:12,000,000 shares at December 31, 2011 and 2010 Issued: 7,440,518 shares at December 31, 2011 and 2010 Outstanding: 6,875,001 and 6,865,150 shares at December 31, 2011 and 2010, respectively	7,441	7,441
Paid-in capital	3,539	2,738
Retained earnings	342,873	351,571
Accumulated other comprehensive income	72	129
Stockholders' Equity before Treasury Stock	353,925	361,879
Treasury stock, at cost, 565,517 and 575,368 shares at December 31, 2011 and 2010, respectively	17,635	17,942
Total stockholders' equity	336,290	343,937
Total liabilities and stockholders' equity	$ 411,641	$ 415,133