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Earnings Per Share (Schedule of Calculation of Numerator and Denominator in Earnings Per Share) (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Share [Abstract]        
Income (loss) from continuing operations $ 2,907,000 $ 4,644,000 $ 7,268,000 $ (3,301,000)
Preferred stock dividends (3,602,000) (3,607,000) (7,209,000) (7,138,000)
Preferred stock redemption costs   (382,000) (1,166,000) (382,000)
Net loss attributable to noncontrolling interests 99,000 124,000 106,000 301,000
Net earnings allocated to unvested shares (198,000) (295,000) (371,000) (448,000)
(Loss) income from continuing operations attribtuable to common shareholders (794,000) 484,000 (1,372,000) (10,968,000)
Results from discontinued operations, net of noncontrolling interests 1,573,000 457,000 1,066,000 2,416,000
Net income (loss) attributable to common shareholders, basic and diluted $ 779,000 $ 941,000 $ (306,000) $ (8,552,000)
Weighted average number of vested common shares outstanding 68,345,000 68,038,000 68,342,000 67,787,000
Continuing operations $ (0.01) $ 0.01 $ (0.02) $ (0.16)
Discontinued operations $ 0.02 $ 0.00 $ 0.02 $ 0.03
Earnings (loss) per common share, basic and fully diluted $ 0.01 $ 0.01 $ 0.00 $ (0.13)