INCOME TAXES (Details 3)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Income Tax Provision to the Luxembourg income tax rate
Statutory tax rate (as a percent)	28.80%	28.80%	28.60%
Foreign rate differential (as a percent)	(23.30%)	(20.03%)	(23.71%)
Tax adjustment for retroactive ruling (as a percent)			(6.13%)
Change in valuation allowance (as a percent)	0.16%		0.44%
State tax expense (as a percent)	0.17%	0.06%	0.26%
Other (as a percent)	1.18%	0.42%	(0.18%)
Income tax provision (as a percent)	7.01%	9.25%	(0.72%)