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Derivative Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative [Line Items] |  |
Derivative, Notional Amount1 | $ 7,058 | $ 7,234
DerivativeAssetFairValueGrossAsset | 12 | 52
Derivative Asset, Fair Value, Gross Liability | 12 | 52
Derivative, Interest Rate Swap, Pay Fixed, Receive Variable [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount1 | 3,529 | 3,617
DerivativeAssetFairValueGrossAsset | 0 | 0
Derivative Asset, Fair Value, Gross Liability | 12 | 52
Derivative, Interest Rate Swap, Pay Variable, Receive Fixed [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount1 | 3,529 | 3,617
DerivativeAssetFairValueGrossAsset | 12 | 52
Derivative Asset, Fair Value, Gross Liability | $ 0 | $ 0

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