Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 54,043	$ 22,953
Marketable securities	22,404	36,404
Accounts receivable	70,171	85,400
Less allowance for doubtful accounts	1,419	1,078
Accounts receivable, net	68,752	84,322
Inventories:
Finished goods	30,308	36,078
Work in process	50,569	49,690
Raw materials and supplies	8,181	6,746
Total inventory	89,058	92,514
Deferred tax assets	6,623	8,083
Income tax receivable	1,668	213
Other current assets	14,321	19,584
Total current assets	256,869	264,073
PROPERTY, PLANT AND EQUIPMENT:
Land and land improvements	4,757	4,007
Buildings	39,927	37,809
Machinery and equipment	126,580	114,056
PROPERTY, PLANT AND EQUIPMENT	171,264	155,872
Less allowance for depreciation and amortization	75,721	66,283
PROPERTY, PLANT AND EQUIPMENT, NET	95,543	89,589
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	10,644	24,698
NOTE RECEIVABLE	3,818	3,695
Total assets	378,359	393,540
CURRENT LIABILITIES:
Accounts payable	32,948	38,323
Accrued liabilities	15,680	15,907
Total current liabilities	48,628	54,230
DEFERRED INCOME TAXES	4,288	6,759
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 shares at December 31, 2014 and 2013; Issued: 7,440,518 shares at December 31, 2014 and 2013; Outstanding: 6,917,222 and 6,902,053 shares at December 31, 2014 and 2013, respectively	7,441	7,441
Paid-in capital	5,906	4,998
Retained earnings	328,417	336,895
Accumulated other comprehensive income	(3)	8
Stockholders' Equity before Treasury Stock	341,761	349,342
Less treasury stock, at cost, 523,296 and 538,465 shares at December 31, 2014 and 2013, respectively	16,318	16,791
Total stockholders' equity	325,443	332,551
Total liabilities and stockholders' equity	$ 378,359	$ 393,540