INCOME TAXES (Reconciliation of Income Tax Uncertainties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation Allowance [Line Items]
Valuation allowance	$ 23,320	$ 11,189
Reconciliation of the beginning and ending amount of income tax uncertainties
Balance at the beginning of period	3,559	3,080	$ 6,356
Increases based on tax positions for the current year	412	360	370
Increases based on tax positions of prior years	663	610	1,562
Settlements	(558)	(491)	(4,874)
Lapse of statute of limitations	(429)		(334)
Balance at the end of period	3,647	3,559	3,080
Foreign taxes payable in the event of non-fulfillment of terms of government grants	1,600
Amount of income tax uncertainties that, if recognized, would impact the effective tax rate	3,600
Decrease in liability for uncertain tax positions, high end of range	1,800
Unrecognized tax benefits, amount accrued for the payment of interest and penalties	1,700	1,900	1,600
Unrecognized tax benefits, amount recognized in income tax expense	(200)	$ 400	$ 100
Deferred tax assets related to tax credit carryforwards, U.S. state
Valuation Allowance [Line Items]
Valuation allowance	3,100
Deferred tax assets for specified locations
Valuation Allowance [Line Items]
Valuation allowance	$ 20,200