INCOME TAXES (Details 3) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets
Federal, state, and foreign net operating losses	$ 18,998	$ 20,372
Postretirement benefits	384	631
Deferred employee benefits	1,270	1,688
Accrued pension	9,256	16,410
Inventory valuation	1,576	2,766
Foreign tax credit carryforwards	0	7,693
Other	883	2,030
Deferred Tax Assets, Gross	32,367	51,590
Less valuation allowance	(28,035)	(45,012)
Total deferred tax assets	4,332	6,578
Deferred Tax Liabilities, Net [Abstract]
Tax over book depreciation	(3,215)	(3,509)
Inventory valuation	(2,003)	(1,995)
Intangible assets	(1,080)	(1,600)
Other	(118)	(303)
Total deferred tax liabilities	(6,416)	(7,407)
Net deferred tax assets and liabilities	$ (2,084)	$ (829)