INCOME TAXES (Deferred Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Tax loss and credit carry-forwards	$ 52,270	$ 44,925
Inventory	2,080	1,607
Other accruals	18,186	17,874
Employee benefits	23,596	21,859
Pension obligations	2,503	2,477
Other	3,020	3,795
Deferred tax assets, gross	101,655	92,537
Valuation allowance	(47,849)	(51,294)
Deferred tax assets, net	53,806	41,243
Deferred tax liabilities:
Property, plant and equipment	32,210	33,627
Intangible assets	17,506	16,105
Inventory	10,059	10,770
Pension obligations	17,915	9,897
Other	9,309	8,800
Deferred tax liabilities	86,999	79,199
Total deferred taxes	(33,193)	$ (37,956)
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	3,186
Tax loss carryforwards of certain subsidiaries that will expire in various years from 2017 through 2032	87,519
Tax loss carryforwards of certain subsidiaries for which there is no expiration date	$ 103,528