Shareholders' Equity/Partners' Capital (AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance, value	$ 6,437,970	$ 6,753,185	$ 6,515,238	$ 6,948,155
Ending balance, value	6,650,813	6,568,317	6,650,813	6,568,317
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance, value	51,776	(60,753)	(17,534)	(75,099)
Other comprehensive income (loss)	21,524	9,316	90,834	23,662
Ending balance, value	73,300	(51,437)	73,300	(51,437)
Accumulated other comprehensive income (loss) of nonconsolidated subsidiaries
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance, value	5,142	(10,747)	(4,063)	(14,338)
Other comprehensive income (loss)	4,755	1,468	13,960	5,059
Ending balance, value	9,897	(9,279)	9,897	(9,279)
Change in fair value of interest rate swaps and other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance, value	50,478	(54,456)	(14,761)	(66,098)
Other comprehensive income (loss)	18,380	8,551	83,619	20,193
Ending balance, value	68,858	(45,905)	68,858	(45,905)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance, value	(3,844)	4,450	1,290	5,337
Other comprehensive income (loss)	(1,611)	(703)	(6,745)	(1,590)
Ending balance, value	$ (5,455)	$ 3,747	$ (5,455)	$ 3,747