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Derivative Instruments Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Derivative [Line Items]    
Asset Derivatives $ 24 $ 10,848
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivative [Line Items]    
Cash Collateral for Interest Rate Swap Contracts $ 38,900  
Asset Derivatives   $ 300