Quarterly report pursuant to Section 13 or 15(d)

Real Estate Acquisitions And Discontinued Operations (Unaudited Pro Forma Combined Condensed Statements Of Operations Information) (Details)

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Real Estate Acquisitions And Discontinued Operations (Unaudited Pro Forma Combined Condensed Statements Of Operations Information) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Real Estate Acquisitions And Discontinued Operations [Abstract]        
Real estate revenues $ 76,823,000 $ 74,471,000 $ 231,370,000 $ 221,135,000
Income from continuing operations 3,283,000 4,046,000 11,330,000 10,784,000
Net income $ 63,585,000 $ 7,578,000 $ 76,268,000 $ 29,665,000
Diluted earnings per share $ 0.96 $ 0.12 $ 1.15 $ 0.48