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Derivative Instruments (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Derivative [Line Items]    
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness $ 0  
Interest Rate Swap Contracts    
Derivative [Line Items]    
Derivative, Notional Amount 75,000,000 $ 75,000,000
Interest Rate Cap Contracts    
Derivative [Line Items]    
Derivative, Notional Amount $ 75,000,000 $ 75,000,000