Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 02, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 10,026	$ 27,034
Marketable securities	128,706	84,457
Accounts receivable, net	38,056	67,285
Inventories:
Finished goods	29,211	25,200
Work in process	83,178	66,528
Raw materials	4,511	3,675
Total inventory	116,900	95,403
Assets held for sale	5,335	58,893
Other current assets	7,028	7,423
Total current assets	306,051	340,495
PROPERTY, PLANT AND EQUIPMENT:
PROPERTY, PLANT AND EQUIPMENT	103,552	101,163
Less allowance for depreciation	55,428	51,688
PROPERTY, PLANT AND EQUIPMENT, NET	48,124	49,475
GOODWILL	11,485	11,485
INTANGIBLE ASSETS, net	4,589	4,961
NOTES RECEIVABLE	6,642	6,534
DEFERRED INCOME TAXES	4,910
OTHER ASSETS	8,138	4,644
Total assets	389,939	417,594
CURRENT LIABILITIES:
Accounts payable	31,175	39,584
Federal and state income taxes	5,579	6,273
Accrued liabilities	12,342	12,244
Liabilities held for sale	17	6,253
Total current liabilities	49,113	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	8,650	7,913
Retained earnings	339,666	350,203
Accumulated other comprehensive loss	(24)	(47)
Stockholders' equity before treasury stock	355,733	365,510
Treasury stock, at cost	14,907	15,274
Total stockholders' equity	340,826	350,236
Total liabilities and stockholders' equity	$ 389,939	$ 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).

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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.