Earnings Per Share (Components Of Earnings Per Common Share - Basic And Diluted) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Continuing Operations:
Income (loss) from continuing operations	$ 24,522	$ (3,126)	$ 67,396	$ 10,485
Gain on sale of property	265	84	407	524
Net income attributable to noncontrolling interests	(950)	(1,087)	(2,052)	(2,221)
Dividends on preferred shares	(5,313)	(8,869)	(12,753)	(17,738)
Redemption costs of preferred shares	(15,702)	0	(17,944)	0
Income (loss) from continuing operations attributable to common shareholders – basic and diluted	2,822	(12,998)	35,054	(8,950)
Discontinued Operations:
Income from discontinued operations	79,391	35,803	81,192	44,390
Net income attributable to noncontrolling interests	(36,792)	(255)	(37,157)	(562)
Income from discontinued operations attributable to common shareholders - basic and diluted	$ 42,599	$ 35,548	$ 44,035	$ 43,828
Denominator:
Weighted average shares outstanding - basic	121,286	120,661	121,172	120,571
Effect of dilutive securities:
Share options and awards	1,288	0	1,223	0
Weighted average shares outstanding - diluted	122,574	120,661	122,395	120,571