Annual report pursuant to Section 13 and 15(d)

QUARTERLY RESULTS OF OPERATIONS (Unaudited) (Narrative) (Details)

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QUARTERLY RESULTS OF OPERATIONS (Unaudited) (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]                
Goodwill impairment $ 10,500,000   $ 20,000,000     $ 10,500,000 $ 20,000,000 $ 0
Net foreign exchange currency losses   $ 8,400,000 (4,200,000) $ 4,400,000 $ 2,700,000 (11,600,000) 3,100,000 (8,800,000)
Accrual for costs of litigation settlement     110,000,000          
United States tax reform rate change     $ (55,700,000)     $ 0 $ (55,685,000) $ 0