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Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company terminated its management agreement with RiverBanc on May 17, 2016 as a result of the Company's acquisition of the remaining 80% membership interest in RiverBanc, which resulted in consolidation of RiverBanc into the Company's financial statements (see Note 23). Prior to May 16, 2016, RiverBanc sourced and managed direct and indirect investments in multi-family properties on behalf of the Company pursuant to a management agreement entered into on April 5, 2011 and amended and restated on March 13, 2013. The amended and restated management agreement had an effective date of January 1, 2013 and had an initial term that expired on December 31, 2015 and was subject to annual automatic one-year renewals (subject to any notice of termination). Prior to May 16, 2016 and as of December 31, 2015, the Company owned a 20% membership interest in RiverBanc. For the years ended December 31, 2016 and 2015, the Company recognized approximately $0.1 million and $0.8 million in equity income related to its investment in RiverBanc, respectively. For the years ended December 31, 2016 and 2015, the Company expensed $1.8 million and $8.1 million in fees to RiverBanc, respectively.