SEGMENT DATA (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Segment Reporting Information [Line Items]
Revenue	$ 550,809	$ 587,116
Capital Expenditures	35,894	28,173
Segment Adjusted EBITDA	78,660	118,830
Corporate expenses	36,338	28,614
Depreciation and amortization	75,753	75,076
Impairment charges	123,137	0	$ 0
Restructuring and other costs	1,824	2,507
Other operating expense, net	6,021	3,522
Interest expense, net	90,142	114,863
Other charges	18,889	6,039
Consolidated net loss before income taxes	(273,444)	(111,791)
Operating segments
Segment Reporting Information [Line Items]
Revenue	550,809	587,116
Segment Adjusted EBITDA	78,660	118,830
Operating segments | Americas
Segment Reporting Information [Line Items]
Revenue	295,787	272,722
Capital Expenditures	15,817	11,408
Segment Adjusted EBITDA	107,958	91,129
Operating segments | Europe
Segment Reporting Information [Line Items]
Revenue	211,690	243,895
Capital Expenditures	10,095	11,934
Segment Adjusted EBITDA	(14,111)	16,481
Operating segments | Other
Segment Reporting Information [Line Items]
Revenue	43,332	70,499
Capital Expenditures	6,342	2,885
Segment Adjusted EBITDA	(15,187)	11,220
Corporate and other reconciling items
Segment Reporting Information [Line Items]
Capital Expenditures	3,640	1,946
Corporate expenses	$ 36,338	$ 28,614