Accumulated Other Comprehensive Loss (Summary of Amounts Reclassified Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	$ 31,872	$ 28,829	$ 98,717	$ 76,358
Provision for income taxes	44,147	8,718	3,203	24,207
Net of tax	(164,002)	(30,043)	(4,817)	(75,296)
Amounts reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income (loss)
Net of tax	4,121	199	8,441	(21)
(Gains) losses on cash flow hedges | Amounts reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	5,216	252	10,685	(26)
Provision for income taxes	$ (1,095)	$ (53)	$ (2,244)	$ 5