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Investments in Real Estate Partnerships - Investment Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Document Fiscal Year Focus 2016  
Capital - Regency $ 405,722 $ 414,681
less: Impairment of investment in real estate partnerships 1,300 1,300
less: Ownership percentage or Restricted Gain Method deferral 29,520 28,972
less: Net book equity in excess of purchase price 78,203 78,203
Investments in real estate partnerships $ 296,699 $ 306,206