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Other Assets (Derivative Instruments - Balance Sheet Location) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Swap | Non-Hedging |  |
Derivative Instruments |  |
Notional amount of derivative assets | $ 230,000 | $ 595,000
Derivative assets, fair value | 0 | 0
Swaps | Hedging |  |
Derivative Instruments |  |
Notional amount of derivative assets | 2,922,000 | 2,622,000
Derivative assets, fair value | $ 0 | $ 0

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