Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 6,125	$ 27,034
Marketable securities	121,291	84,457
Accounts receivable, net	44,637	67,285
Inventories:
Finished goods	35,888	25,200
Work in process	89,109	66,528
Raw materials	4,546	3,675
Total inventory	129,543	95,403
Assets held for sale	4,064	58,893
Other current assets	6,778	7,423
Total current assets	312,438	340,495
PROPERTY, PLANT AND EQUIPMENT:
PROPERTY, PLANT AND EQUIPMENT	103,885	101,163
Less allowance for depreciation	56,712	51,688
PROPERTY, PLANT AND EQUIPMENT, NET	47,173	49,475
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	4,110	4,961
NOTES RECEIVABLE	6,696	6,534
DEFERRED INCOME TAXES	4,904
OTHER ASSETS	6,832	4,644
Total assets	393,638	417,594
CURRENT LIABILITIES:
Accounts payable	27,685	39,584
Federal and state income taxes	3,235	6,273
Accrued liabilities	13,196	12,244
Liabilities held for sale	105	6,253
Total current liabilities	44,221	64,354
DEFERRED INCOME TAXES		3,004
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	8,855	7,913
Retained earnings	347,997	350,203
Accumulated other comprehensive loss	(12)	(47)
Stockholders' equity before treasury stock	364,281	365,510
Treasury stock, at cost	14,864	15,274
Total stockholders' equity	349,417	350,236
Total liabilities and stockholders' equity	$ 393,638	$ 417,594

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.