Company Earnings Per Share (Schedule Of Computation Of Basic And Diluted Net Income (Loss) Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 21,865	$ 3,013
Noncontrolling interests - consolidated real estate entities	(6)	11
Noncontrolling interests - Operating Partnership	(59)	1
Dividends to preferred shareholders	(922)	(1,689)
Preferred stock redemption costs		(1,757)
Unvested restricted stock (allocation of earnings)	(46)	2
Net income (loss) available to common shareholders	$ 20,832	$ (419)
Weighted average shares outstanding-basic	53,087,000	49,041,000
Dilutive shares from stock options	406,000
Weighted average shares outstanding-diluted	53,493,000	49,041,000
Per-share amount: Basic	$ 0.39	$ (0.01)
Per-share amount: Diluted	$ 0.39	$ (0.01)
Gross Antidilutive [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock options to purchase common stock	264,000	1,705,000