VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 1,409	$ 2,011	$ 1,581
Charged to Costs and Expenses	750	556	1,484
Removal of Uncollectable Receivables	(799)	(1,127)	(1,042)
Translation Adjustments Increase (Decrease)	(54)	(31)	(12)
Balance at the End of Period	1,306	1,409	2,011
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	119,117	137,961	134,761
Charged to Costs and Expenses	9,381	(10,437)	6,640
Other	(149)	(7,062)	(2,212)
Translation Adjustments Increase (Decrease)	(4,206)	(1,345)	(1,228)
Balance at the End of Period	$ 124,143	$ 119,117	$ 137,961