INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets
Other	$ 1,107	$ 348
Total deferred tax assets	1,107	348
Valuation allowances	0	0
Deferred Tax Assets, Net of Valuation Allowance	1,107	348
Deferred tax liabilities
Property, plant and equipment	15,786	15,796
Inventory	25,686	17,707
Total deferred tax liabilities	41,472	33,503
Net deferred tax assets (liability)	$ (40,365)	$ (33,155)