Equity - Changes in AOCI/L by Component (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 991,219	$ 890,275	$ 938,593	$ 963,802	$ 856,897	$ 850,757	$ 938,593	$ 850,757
Change in AOCI/L before reclassifications to income	6,465			(6,731)			(73,088)	(37,146)
Reclassifications from AOCL/I to income	5,497			(1,054)			20,813	(4,251)
Other comprehensive income (loss), net of tax	11,962	26,797	(91,034)	(7,785)	(11,913)	(21,699)	(52,275)	(41,397)
Ending balance	1,037,503	991,219	890,275	919,657	963,802	856,897	1,037,503	919,657
Derivative reclassifications	(7,344)			(2,863)			(40,173)	951
Interest (income) expense, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	(7,165)			1,504			(17,679)	6,015
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Loss to be reclassified within twelve months							28,900
Interest rate swaps | Other Expense
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications							10,300
Interest rate swaps | Interest (income) expense, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	7,200						17,700
Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(88,996)		(47,164)	(46,990)		(7,770)	(47,164)	(7,770)
Change in AOCI/L before reclassifications to income	(1,033)			(10,285)			(58,022)	(46,224)
Reclassifications from AOCL/I to income	5,412			(1,094)			20,569	(4,375)
Other comprehensive income (loss), net of tax	4,379			(11,379)			(37,453)	(50,599)
Ending balance	(84,617)	(88,996)		(58,369)	(46,990)		(84,617)	(58,369)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8,425)		(8,584)	(5,655)		(5,738)	(8,584)	(5,738)
Change in AOCI/L before reclassifications to income	0			0			0	0
Reclassifications from AOCL/I to income	85			41			244	124
Other comprehensive income (loss), net of tax	85			41			244	124
Ending balance	(8,340)	(8,425)		(5,614)	(5,655)		(8,340)	(5,614)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(44,754)		(22,190)	(20,834)		(26,359)	(22,190)	(26,359)
Change in AOCI/L before reclassifications to income	7,498			3,553			(15,066)	9,078
Reclassifications from AOCL/I to income	0			0			0	0
Other comprehensive income (loss), net of tax	7,498			3,553			(15,066)	9,078
Ending balance	(37,256)	(44,754)		(17,281)	(20,834)		(37,256)	(17,281)
Accumulated Other Comprehensive Loss, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(142,175)	(168,972)	(77,938)	(73,479)	(61,566)	(39,867)	(77,938)	(39,867)
Other comprehensive income (loss), net of tax	11,962	26,797	(91,034)	(7,785)	(11,913)	(21,699)
Ending balance	$ (130,213)	$ (142,175)	$ (168,972)	$ (81,264)	$ (73,479)	$ (61,566)	$ (130,213)	$ (81,264)