INCOME TAXES Effective Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income taxes at Netherlands rates (25%)	$ 43,310	$ 25,689	$ 38,193
Jurisdictional differences in tax rates	(43,049)	(17,462)	(12,965)
Unrecognized tax benefits	(925)	0	0
Losses expired	(1,847)	(4,009)	(4,899)
Change in valuation allowance	(5,863)	3,614	(7,012)
Non-deductible expenses	(395)	(1,859)	(5,624)
Other	1,452	(5,458)	(6,335)
(Provision) / credit for income taxes	$ (7,317)	$ 515	$ 1,358