Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 54,541	$ (33,623)	$ 152,339	$ 33,677
Less: Preferred share dividends	(2,010)	(2,010)	(6,031)	(6,031)
Less: (Income) loss from operations attributable to noncontrolling interests	(2,419)	5,334	(5,777)	3,304
Less: Earnings allocated to unvested shares	(309)	(249)	(901)	(745)
Net income (loss) available for common shareholders, basic and diluted	$ 49,803	$ (30,548)	$ 139,630	$ 30,205
Weighted average common shares outstanding, basic	77,485	75,404	77,269	75,386
Open forward contracts for share issuances	90	0	18	0
Weighted average common shares outstanding, diluted	77,575	75,404	77,287	75,386
EARNINGS PER COMMON SHARE, BASIC:
Net income (loss) available for common shareholders	$ 0.64	$ (0.41)	$ 1.81	$ 0.40
EARNINGS PER COMMON SHARE, DILUTED:
Net income (loss) available for common shareholders	$ 0.64	$ (0.41)	$ 1.81	$ 0.40