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Derivative Financial Instruments - Summary of Outstanding Swaptions (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Mar. 31, 2016
Derivatives, Fair Value [Line Items]    
Assets, at Fair Value $ 669,000 $ 826,000
Interest Rate Swaption [Member]    
Derivatives, Fair Value [Line Items]    
Assets, at Fair Value 669,000  
Interest Rate Swaption [Member] | Less Than Or Equal To One Year [Member]    
Derivatives, Fair Value [Line Items]    
Swaption Cost 1,100,000  
Assets, at Fair Value $ 669,000  
Derivative Instruments Average Months To Expiration 4 months 5 days  
Notional Amount $ 100,000,000  
Derivative Average Fixed Interest Rate 1.77%  
Derivative Avergage Receive Rate 3 Month  
Term (Years) 5 years