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Derivatives Derivative Instruments, Gain (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Abstract]    
Derivative, Gain (Loss) on Derivative, Net $ (312) $ (605)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge $ 312 $ 605