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INCOME TAXES Income Loss Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Domestic $ (38,434) $ (50,344) $ (66,517)
Foreign 163,327 123,911 (106,523)
Income / (loss) before tax $ 124,893 $ 73,567 $ (173,040)