Segment Information - Reconciliation to Income from Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		18 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021
Reconciliation of Adjusted EBITDA to income from continuing operations
Net Income (Loss)	$ 46,631	$ 64,892
Interest expense, net	104,422	105,649
Provision (benefit) for income taxes	14,640	9,687
Depreciation and amortization	165,642	162,584
Restructuring Charges	39,811	41,046	$ 282,804
Intangible impairments	0	23,000
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(4,451)	(1,055)
Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures	2,121	(45,031)
Stock-based compensation expense	10,733	5,111
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	1,016	116
Adjusted EBITDA	$ 380,565	$ 365,999