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Derivatives Schedule of Cash Flow Hedges in Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Derivative [Line Items]    
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ (301) $ (507)
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net 0 0
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net $ 0 $ 0