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Derivative Financial Instruments - Narrative (Details) - Interest-rate swap contracts
6 Months Ended
Jun. 30, 2020
USD ($)
Aug. 31, 2020
USD ($)
derivative
Maximum    
Derivative [Line Items]    
Estimate change in fair value of derivative for assumption of one percentage point change in the interest rate $ 1,000,000  
Subsequent Event    
Derivative [Line Items]    
Number of interest-rate contracts held | derivative   3
Derivative asset, notional amount   $ 41,000,000