Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 25,289	$ 22,953
Marketable securities	20,625	36,404
Accounts receivable, net	50,265	84,322
Inventories:
Finished goods	45,228	36,078
Work in process	58,086	49,690
Raw materials	10,126	6,746
Supplies	69
Total inventory	113,509	92,514
Deferred tax assets	8,083	8,083
Income tax receivable	6,492	213
Other current assets	16,516	19,584
Total current assets	240,779	264,073
Property, Plant and equipment, gross	168,447	155,872
Less allowance for depreciation	73,402	66,283
PROPERTY, PLANT AND EQUIPMENT, NET	95,045	89,589
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	16,183	24,698
NOTE RECEIVABLE	3,786	3,695
Total assets	367,278	393,540
CURRENT LIABILITIES:
Accounts payable	33,161	38,323
Accrued liabilities	14,809	15,907
Total current liabilities	47,970	54,230
DEFERRED INCOME TAX	6,759	6,759
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 Issued: 7,440,518	7,441	7,441
Paid-in capital	5,654	4,998
Retained earnings	315,941	336,895
Accumulated other comprehensive income	8	8
Stockholders' Equity before Treasury Stock	329,044	349,342
Treasury stock, at cost	16,495	16,791
Total stockholders' equity	312,549	332,551
Total liabilities and stockholders' equity	$ 367,278	$ 393,540