Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 56,441	$ 61,803
Less: Preferred share dividends	(2,010)	(2,010)
Less: Income from operations attributable to noncontrolling interests	(1,678)	(1,659)
Less: Earnings allocated to unvested shares	(247)	(220)
Net income available for common shareholders, basic and diluted	$ 52,506	$ 57,914
Weighted average common shares outstanding—basic and diluted	75,360	74,200
Earnings per common share, basic and diluted	$ 0.70	$ 0.78