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Interest Rate Swap Derivatives (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Notional Amount | $ 250,000 | $ 250,000
Fair value | 4,788 | 2,256
Other Assets [Member] | Interest Rate Swap 1 [Member] |  |
Notional Amount | 75,000 | 75,000
Fair value | 1,070 | 598
Other Assets [Member] | Interest Rate Swap 3 [Member] |  |
Notional Amount | 75,000 | 75,000
Fair value | 1,943 | 837
Other Assets [Member] | Interest Rate Swap 2 [Member] |  |
Notional Amount | 100,000 | 100,000
Fair value | $ 1,775 | $ 821

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