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Significant Accounting Policies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
properties
beds_or_units
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums | $ $ (1,317)
Variable Interest Entity, Number Of Entities, Not Primary Beneficiary 7
Number of Real Estate Properties 197
Property, Plant and Equipment, Useful Life 40 years
Building [Member]  
Property, Plant and Equipment, Useful Life 40 years
Minimum [Member] | Building Improvements [Member]  
Property, Plant and Equipment, Useful Life 3 years
Maximum [Member] | Building Improvements [Member]  
Property, Plant and Equipment, Useful Life 25 years
Nonperforming Financial Instruments [Member]  
Number of Real Estate Properties 1
Number of Units in Real Estate Property | beds_or_units 126