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Real Estate (Pro Forma Financial Information) (Details) (USD $)
8 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Real Estate [Abstract]      
Pro forma total revenues   $ 466,327,000us-gaap_BusinessAcquisitionsProFormaRevenue $ 399,885,000us-gaap_BusinessAcquisitionsProFormaRevenue
Pro forma net income (loss)   (245,000)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss (112,355,000)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Business combination, pro forma information, revenue of acquiree since acquisition date, actual 8,300,000us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual    
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual $ (2,900,000)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual