Derivatives and Hedging Activities Derivative Instruments and Hedging Activities - Amounts Affecting Consolidated Statements of Income (Details) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
Derivative, Gain (Loss) on Derivative, Net | $ 743 | $ 885 |