INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Valuation allowances	$ 9,357		$ 11,679
Loss carryforwards			66,118
Increase (decrease) in additional paid-in-capital for tax impact of stock-based compensation	(303)	$ 106
Income considered to be permanently reinvested in non-U.S. subsidiaries	30,726	$ 37,772	35,239
Unrecognized tax benefits	0		0
Accrual for interest and penalties related to uncertain tax positions	$ 0		0
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Loss carryforwards			53,702
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Loss carryforwards			$ 12,416