Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 27,034	$ 56,222
Marketable securities	84,457	32,259
Accounts receivable	69,101	57,374
Less allowance for doubtful accounts	1,816	1,796
Accounts receivable, net	67,285	55,578
Inventories:
Finished goods	25,200	27,765
Work in process	66,528	57,397
Raw materials and supplies	3,675	3,747
Total inventory	95,403	88,909
Assets held for sale	58,893	21,663
Other current assets	7,423	6,961
Total current assets	340,495	261,592
PROPERTY, PLANT AND EQUIPMENT:
Land and land improvements	4,933	4,807
Buildings	47,012	43,392
Machinery and equipment	49,218	48,701
PROPERTY, PLANT AND EQUIPMENT	101,163	96,900
Less allowance for depreciation	51,688	43,741
PROPERTY, PLANT AND EQUIPMENT, NET	49,475	53,159
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	4,961	5,471
NOTES RECEIVABLE	6,534	3,940
DEFERRED INCOME TAXES		3,336
ASSETS HELD FOR SALE		38,147
OTHER ASSETS	4,644	10,254
Total assets	417,594	387,384
CURRENT LIABILITIES:
Accounts payable	39,584	27,748
Federal and state income taxes	6,273	2,196
Accrued liabilities	12,244	12,570
Liabilities held for sale	6,253	5,616
Total current liabilities	64,354	48,130
DEFERRED INCOME TAXES	3,004
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 shares at December 31, 2016 and 2015; Issued: 7,440,518 shares at December 31, 2016 and 2015; Outstanding: 6,950,786 and 6,935,471 shares at December 31, 2016 and 2015, respectively	7,441	7,441
Paid-in capital	7,913	6,775
Retained earnings	350,203	340,799
Accumulated other comprehensive loss	(47)	(9)
Stockholders' equity before treasury stock	365,510	355,006
Less treasury stock, at cost, 489,732 and 505,047 shares at December 31, 2016 and 2015, respectively	15,274	15,752
Total stockholders' equity	350,236	339,254
Total liabilities and stockholders' equity	$ 417,594	$ 387,384