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Derivative Instruments Fair Values of Derivative Instruments on the Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value, gross asset $ 5,918 $ 29
Derivative liability, fair value, gross liability 4,775 8,683
Interest Rate Swap | Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value, gross asset 5,907 0
Interest Rate Swap | Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value, gross liability 4,775 0
Interest Rate Swap | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value, gross asset 0 0
Interest Rate Swap | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value, gross liability 0 8,683
Interest Rate Cap | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value, gross asset 11 29
Interest Rate Cap | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value, gross liability $ 0 $ 0