Derivatives (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Stockholders' equity	$ (4,006,932,000)	$ (4,260,143,000)	$ (4,006,932,000)	$ (4,260,143,000)	$ (3,915,526,000)	$ (3,901,663,000)	$ (4,270,878,000)	$ (4,319,304,000)
Gain (loss) reclassification to interest expense	595,000	565,000	1,770,000	2,494,000
Interest rate cash flow hedge gain (loss) to be reclassified over next 12 months, net	2,447,000		2,447,000
Accumulated other comprehensive income (loss)	(13,186,000)		(13,186,000)			(14,956,000)
AOCI, cash flow hedges
Derivative [Line Items]
Stockholders' equity	13,186,000		13,186,000			14,956,000
Accumulated Other Comprehensive Income (Loss)
Derivative [Line Items]
Stockholders' equity	13,186,000	15,535,000	13,186,000	15,535,000	$ 13,781,000	$ 14,956,000	$ 14,516,000	$ 16,445,000
Gain (loss) reclassification to interest expense	$ 595,000	$ 565,000	$ 1,770,000	$ 2,494,000