INCOME TAXES (Details 2) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Current income tax provision	$ 15,532	$ 9,586	$ 9,012
Deferred:
Deferred income tax provision	(2,597)	(1,326)	1,166
Total	$ 12,935	$ 8,260	$ 10,178
Statutory tax rate	29.22%	29.22%	29.22%
Decrease in foreign taxes due to tax holidays	$ 900	$ 800	$ 900
Effect on diluted per share due to decrease in foreign tax holiday (in dollars per share)	$ 0.04	$ 0.04	$ 0.04
Luxembourg
Current:
Current income tax provision	$ 160	$ 1,787	$ 4,415
Deferred:
Foreign	432	0	0
U.S. Federal
Current:
Foreign	9,556	539	75
Deferred:
Foreign	(3,065)	(108)	1,756
U.S. State
Current:
Foreign	258	855	476
Deferred:
Foreign	(100)	(526)	(281)
Non-U.S.
Current:
Foreign	5,558	6,405	4,046
Deferred:
Foreign	$ 136	$ (692)	$ (309)