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Recent Accounting Pronouncements (Narrative) (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
ASU 2018-02 | New Accounting Pronouncement, Early Adoption, Effect |
New Accounting Pronouncement, Early Adoption [Line Items] |
Reclassification from AOCI to retained earnings, Tax Cuts and Jobs Act of 2017 | $ 10

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