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Real Estate (Pro Forma Financial Information) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Real Estate [Abstract]        
Business combination, pro forma information, revenue of acquiree since acquisition date, actual     $ 5,300,000  
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual     (1,700,000)  
Business combination, pro forma revenue 113,486,000 98,740,000 356,378,000 298,811,000
Business combination, pro forma net income (loss) $ 35,491,000 $ (18,921,000) $ 17,306,000 $ (66,366,000)