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INCOME TAXES (Details 4)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reconciliation of Income Tax Provision to the Luxembourg income tax rate      
Statutory tax rate 29.22% 29.22% 29.22%
Permanent difference related to Luxembourg intangible assets 0.00% (13.56%) (22.60%)
Change in valuation allowance (0.08%) 0.83% (0.05%)
State tax expense 2.30% 0.29% 0.03%
Tax credits (1.81%) (2.34%) (0.71%)
Uncertain taxes (3.65%) 1.39% 0.88%
Other 3.20% (0.26%) 0.14%
Effective tax rate 29.18% 15.57% 6.91%