Equity - Changes in AOCI/L by Component (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 890,275	$ 938,593	$ 856,897	$ 850,757	$ 938,593	$ 850,757
Change in AOCI/L before reclassifications to income	13,882		(10,324)		(79,553)	(30,413)
Reclassifications from AOCL/I to income	12,915		(1,589)		15,316	(3,199)
Other comprehensive loss, net of tax	26,797	(91,034)	(11,913)	(21,699)	(64,237)	(33,612)
Ending balance	991,219	890,275	963,802	856,897	991,219	963,802
Derivative reclassifications	17,037		295		32,828	(3,814)
Interest (income) expense, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	7,322		(2,240)		10,514	(4,511)
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Loss to be reclassified within twelve months					28,700
Interest rate swaps | Other Expense
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	(10,300)				(10,300)
Interest rate swaps | Interest (income) expense, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	(7,300)				(10,500)
Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(91,896)	(47,164)	(22,275)	(7,770)	(47,164)	(7,770)
Change in AOCI/L before reclassifications to income	(9,935)		(23,085)		(56,989)	(35,938)
Reclassifications from AOCL/I to income	12,835		(1,630)		15,157	(3,282)
Other comprehensive loss, net of tax	2,900		(24,715)		(41,832)	(39,220)
Ending balance	(88,996)	(91,896)	(46,990)	(22,275)	(88,996)	(46,990)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8,505)	(8,584)	(5,696)	(5,738)	(8,584)	(5,738)
Change in AOCI/L before reclassifications to income	0		0		0	0
Reclassifications from AOCL/I to income	80		41		159	83
Other comprehensive loss, net of tax	80		41		159	83
Ending balance	(8,425)	(8,505)	(5,655)	(5,696)	(8,425)	(5,655)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(68,571)	(22,190)	(33,595)	(26,359)	(22,190)	(26,359)
Change in AOCI/L before reclassifications to income	23,817		12,761		(22,564)	5,525
Reclassifications from AOCL/I to income	0		0		0	0
Other comprehensive loss, net of tax	23,817		12,761		(22,564)	5,525
Ending balance	(44,754)	(68,571)	(20,834)	(33,595)	(44,754)	(20,834)
Accumulated Other Comprehensive Loss, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(168,972)	(77,938)	(61,566)	(39,867)	(77,938)	(39,867)
Other comprehensive loss, net of tax	26,797	(91,034)	(11,913)	(21,699)
Ending balance	$ (142,175)	$ (168,972)	$ (73,479)	$ (61,566)	$ (142,175)	$ (73,479)