Loans Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	$ 20,196	$ 18,586	$ 17,012
Charge-offs	(1,735)	(1,532)	(1,559)
Recoveries	647	535	397
Provision	2,079	2,607	2,736
Allowance for Credit Losses, Ending Balance	21,187	20,196	18,586
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	47	4
Allowance for loan losses - Loans Collectively Evaluated for Impairment	21,140	20,192
Ending Loan Balance - Individually Evaluated for Impairment	1,101	3,223
Ending Loan Balance - Collectively Evaluated for Impairment	2,385,019	2,192,992
Commercial
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	1,218	1,873	1,017
Charge-offs	(12)	(153)	(2)
Recoveries	98	3	9
Provision	82	(505)	849
Allowance for Credit Losses, Ending Balance	1,386	1,218	1,873
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	5	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	1,381	1,218
Ending Loan Balance - Individually Evaluated for Impairment	35	430
Ending Loan Balance - Collectively Evaluated for Impairment	150,625	136,460
Commercial Real Estate
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	5,644	4,504	5,677
Charge-offs	(29)	(17)	(380)
Recoveries	0	12	0
Provision	215	1,145	(793)
Allowance for Credit Losses, Ending Balance	5,830	5,644	4,504
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	5,830	5,644
Ending Loan Balance - Individually Evaluated for Impairment	0	793
Ending Loan Balance - Collectively Evaluated for Impairment	510,541	483,769
Other Consumer
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	8,882	7,604	6,120
Charge-offs	(1,603)	(1,246)	(1,101)
Recoveries	549	520	388
Provision	1,580	2,004	2,197
Allowance for Credit Losses, Ending Balance	9,408	8,882	7,604
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	9,408	8,882
Ending Loan Balance - Individually Evaluated for Impairment	107	101
Ending Loan Balance - Collectively Evaluated for Impairment	811,091	719,409
Residential Portfolio Segment
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	4,452	4,605	4,198
Charge-offs	(91)	(116)	(76)
Recoveries	0	0	0
Provision	202	(37)	483
Allowance for Credit Losses, Ending Balance	4,563	4,452	$ 4,605
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	42	4
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,521	4,448
Ending Loan Balance - Individually Evaluated for Impairment	959	1,899
Ending Loan Balance - Collectively Evaluated for Impairment	$ 912,762	$ 853,354

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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