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Mortgage and Other Indebtedness (Derivative Instruments) (Details)
$ in Thousands
Mar. 31, 2016
USD ($)
derivative_instrument
Dec. 31, 2015
USD ($)
derivative_instrument
Derivatives, Fair Value [Line Items]    
Fair Value $ 0 $ (434)
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | derivative_instrument 4 4
Notional Amount Outstanding $ 100,009 $ 101,151
Cash Flow Hedging | Pay fixed receive variable swap One | Accrued Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount Outstanding 48,337  
Amortized amount $ 48,337  
Strike Rate (as a percent) 2.149%  
Fair Value $ 0 (208)
Cash Flow Hedging | Pay fixed receive variable swap Two | Accrued Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount Outstanding 30,276  
Amortized amount $ 30,276  
Strike Rate (as a percent) 2.187%  
Fair Value $ 0 (133)
Cash Flow Hedging | Pay fixed receive variable swap Three | Accrued Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount Outstanding 11,313  
Amortized amount $ 11,313  
Strike Rate (as a percent) 2.142%  
Fair Value $ 0 (48)
Cash Flow Hedging | Pay fixed receive variable swap Four | Accrued Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount Outstanding 10,083  
Amortized amount $ 10,083  
Strike Rate (as a percent) 2.236%  
Fair Value $ 0 $ (45)