Accumulated Other Comprehensive (Loss) Income - Activity in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,833,018
Other comprehensive income (loss) - net of tax	9,747	$ (1,611)	$ (12,285)
Ending balance	3,790,440	1,833,018
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(14,126)	(12,515)
Ending balance	(4,379)	(14,126)	(12,515)
Pension and other postretirement benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4,758)	(8,027)	(7,126)
Other comprehensive income (loss) - net of tax	1,433	3,269	(901)
Ending balance	(3,325)	(4,758)	(8,027)
Pension and other postretirement benefits, gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before reclassifications, before tax	(317)	1,180	(2,926)
Other comprehensive income (loss), before reclassifications, tax	25	3	27
Other comprehensive income (loss), before reclassifications	(342)	1,177	(2,953)
Pension and other postretirement benefits, prior service cost
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications, before tax	1,775	2,092	2,052
Net amount reclassified from AOCI to net income/loss	1,775	2,092	2,052
Foreign currency translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(6,710)	(3,322)	8,318
Other comprehensive income (loss), before reclassifications, before tax	9,944	(783)	(11,640)
Reclassifications, before tax	0	(2,605)	0
Other comprehensive income (loss) - net of tax	9,944	(3,388)	(11,640)
Ending balance	3,234	(6,710)	(3,322)
Hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,658)	(1,166)	(1,422)
Other comprehensive income (loss), before reclassifications, tax	0	0	173
Other comprehensive income (loss), before reclassifications	(24,918)	(1,450)	689
Ending balance	(4,288)	(2,658)	(1,166)
Cash flow hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before reclassifications, before tax	(30,168)	(1,450)	862
Investment hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss), before reclassifications, before tax	5,250	0	0
Interest expense | Hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net amount reclassified from AOCI to net income/loss	3,442	(306)	1,191
Loss on debt extinguishment, modifications and termination of derivative instruments | Hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net amount reclassified from AOCI to net income/loss	7,688	0	1,825
Foreign exchange loss (gain), net | Hedge derivative
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net amount reclassified from AOCI to net income/loss	$ 12,158	$ 264	$ (3,449)