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Allowance for Loan Losses (Narrative) (Details) $ in Thousands	Dec. 31, 2016 USD ($) loan	Dec. 31, 2015 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Loans And Leases Receivable Gross Carrying Amount	$ 504,265	$ 482,043
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Loans And Leases Receivable Gross Carrying Amount	$ 9,506	$ 8,268
Consumer Installment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Loans And Leases Receivables Number Of Loans | loan	1
Credit Quality Loans And Leases Receivable Gross Carrying Amount	$ 5

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