Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 46,388	$ 37,437
Marketable securities	44,321	55,586
Accounts receivable, net	61,376	76,443
Inventories:
Finished goods	56,779	33,851
Work in process	46,299	40,340
Raw materials	8,165	9,173
Total inventory	111,243	83,364
Deferred tax assets	8,906	8,906
Other current assets	12,561	9,018
Total current assets	284,795	270,754
PROPERTY, PLANT AND EQUIPMENT	141,282	123,418
Less allowance for depreciation	67,607	61,553
PROPERTY, PLANT AND EQUIPMENT, NET	73,675	61,865
GOODWILL & OTHER INTANGIBLES	17,222	17,722
NOTE RECEIVABLE	3,664	3,571
Total assets	379,356	353,912
CURRENT LIABILITIES:
Accounts payable	40,720	39,077
Federal and state income taxes	1,053	1,642
Accrued liabilities	15,081	15,254
Total current liabilities	56,854	55,973
DEFERRED INCOME TAXES	7,353	7,368
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	4,780	4,472
Retained earnings	319,812	295,643
Accumulated other comprehensive income	26	53
Stockholders' Equity before Treasury Stock	332,059	307,609
Treasury stock, at cost	16,910	17,038
Total stockholders' equity	315,149	290,571
Total liabilities and stockholders' equity	$ 379,356	$ 353,912