Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 03, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 19,017	$ 56,222
Marketable securities	56,282	32,259
Accounts receivable, net	53,426	67,528
Inventories:
Finished goods	37,240	32,585
Work in process	69,277	57,484
Raw materials and supplies	9,927	8,553
Total inventory	116,444	98,622
Income tax receivable	4,332
Other current assets	7,553	6,961
Total current assets	257,054	261,592
PROPERTY, PLANT AND EQUIPMENT:
PROPERTY, PLANT AND EQUIPMENT	179,643	177,628
Less allowance for depreciation	92,088	86,322
PROPERTY, PLANT AND EQUIPMENT, NET	87,555	91,306
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	4,903	5,471
NOTES RECEIVABLE	6,427	3,940
DEFERRED INCOME TAXES		3,336
OTHER ASSETS	9,063	10,254
Total assets	376,487	387,384
CURRENT LIABILITIES:
Accounts payable	40,692	32,536
Federal and state income taxes		2,196
Accrued liabilities	13,462	13,398
Total current liabilities	54,154	48,130
DEFERRED INCOME TAXES	1,723
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 shares; Issued: 7,440,518 shares	7,441	7,441
Paid-in capital	7,450	6,775
Retained earnings	321,123	340,799
Accumulated other comprehensive income (loss)	9	(9)
Stockholders' Equity before Treasury Stock	336,023	355,006
Treasury stock, at cost	15,413	15,752
Total stockholders' equity	320,610	339,254
Total liabilities and stockholders' equity	$ 376,487	$ 387,384