Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 37,437	$ 73,995
Marketable securities	55,586	59,360
Accounts receivable	82,554	74,995
Less allowance for doubtful accounts	6,111	1,361
Accounts receivable, net	76,443	73,634
Inventories:
Finished goods	33,851	32,759
Work in process	40,340	50,462
Raw materials	9,173	11,285
Total inventory	83,364	94,506
Deferred tax assets	8,906	6,140
Other current assets	9,018	21,270
Total current assets	270,754	328,905
PROPERTY, PLANT AND EQUIPMENT:
Land and land improvements	2,010	1,955
Buildings	30,708	29,348
Machinery and equipment	90,700	90,305
PROPERTY, PLANT AND EQUIPMENT	123,418	121,608
Less allowance for depreciation and amortization	61,553	57,340
PROPERTY, PLANT AND EQUIPMENT, NET	61,865	64,268
GOODWILL & OTHER INTANGIBLES	17,722	18,468
NOTE RECEIVABLE	3,571
Total assets	353,912	411,641
CURRENT LIABILITIES:
Accounts payable	39,077	48,344
Federal and state income taxes	1,642	1,567
Accrued liabilities	15,254	16,035
Total current liabilities	55,973	65,946
DEFERRED INCOME TAXES	7,368	9,405
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 shares at December 31, 2012 and 2011; Issued: 7,440,518 shares at December 31, 2012 and 2011; Outstanding: 6,894,158 and 6,875,001 shares at December 31, 2012 and 2011, respectively	7,441	7,441
Paid-in capital	4,472	3,539
Retained earnings	295,643	342,873
Accumulated other comprehensive income	53	72
Stockholders' Equity before Treasury Stock	307,609	353,925
Less treasury stock, at cost, 546,360 and 565,517 shares at December 31, 2012 and 2011, respectively	17,038	17,635
Total stockholders' equity	290,571	336,290
Total liabilities and stockholders' equity	$ 353,912	$ 411,641