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INCOME TAX - Income Before Income Taxes, Domestic and Foreign (Details) - USD ($)
$ in Thousands
7 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
May 31, 2016
May 31, 2015
Income Tax Disclosure [Abstract]        
United States $ (55,279) $ 29,692 $ 59,876 $ 135,901
Foreign 228,623 362,991 301,036 281,209
Income before income taxes $ 173,344 $ 392,683 $ 360,912 $ 417,110