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Derivatives (Gains/(Losses) on Derivatives Associated with Trust Preferred Loans) (Details) - Loan Portfolio Hedging - Hedging Instruments And Hedged Items - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Interest Rate Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains/(Losses) Related to Interest Rate Derivatives | $ 280 | $ 256
Trust Preferred Loans |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains/(Losses) Related to Changes in Fair Value Attributable to Interest Rate Risk | $ (276) | $ (253)

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