Loans and Allowance for Credit Losses (Aging of Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 2,284	$ 3,040
Nonaccrual	4,880	5,455
Total loans	$ 1,461,522	$ 1,454,256
Percent of total loans, Total past due	0.20%	0.30%
Percent of total loans, Nonaccrual	0.30%	0.40%
Percent of total loans, Total loans	100.00%	100.00%
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,454,358	$ 1,445,761
Percent of total loans, Current	99.50%	99.30%
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,058	$ 1,229
Percent of total loans, Total past due	0.10%	0.10%
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 38	$ 1,007
Percent of total loans, Total past due		0.10%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,188	$ 804
Percent of total loans, Total past due	0.10%	0.10%
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,221	$ 1,747
Nonaccrual	1,222	1,585
Total loans	449,651	443,542
Residential Portfolio Segment [Member] \| Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	447,208	440,210
Residential Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	505	517
Residential Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	38	938
Residential Portfolio Segment [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	678	292
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	873	879
Nonaccrual	3,085	3,287
Total loans	641,155	661,232
Commercial Real Estate Portfolio Segment [Member] \| Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	637,197	657,066
Commercial Real Estate Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	363	367
Commercial Real Estate Portfolio Segment [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	510	512
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	143	294
Nonaccrual	248	258
Total loans	218,923	211,256
Commercial Portfolio Segment [Member] \| Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	218,532	210,704
Commercial Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	143	226
Commercial Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		68
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	15	120
Nonaccrual	28	28
Total loans	35,822	31,466
Consumer Portfolio Segment [Member] \| Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	35,779	31,318
Consumer Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	15	119
Consumer Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		1
Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	32
Nonaccrual	297	297
Total loans	115,971	106,760
Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member] \| Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	115,642	$ 106,463
Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 32

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Recorded investment in financing receivables percentage that are on nonaccrual status as of the balance sheet date.

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Recorded Investment in financing receivables percentage that are past due at the balance sheet date.

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Amount of financing receivable on nonaccrual status.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount, before allowance for credit loss, of financing receivable.

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