Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	$ 11,781	$ 16,624
New TDRs	41
Disbursements (Payments)	(2,273)	(935)
Charge offs	(3)	(477)
Reclassifications/Transfer In/(Out)		(74)
Payoffs	(353)	(3,357)
TDR ending balance	9,193	11,781
TDR, Related Allowance	312	556
Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	3,118	3,298
Disbursements (Payments)	(1,423)	(180)
Charge offs	(3)	(80)
Reclassifications/Transfer In/(Out)		80
TDR ending balance	1,692	3,118
TDR, Related Allowance	113	336
Impaired Nonaccrual Loans [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge offs		(80)
Reclassifications/Transfer In/(Out)	1,393	80
TDR ending balance	1,393
TDR, Related Allowance	113
Impaired Nonaccrual Loans [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance		83
Reclassifications/Transfer In/(Out)		(83)
Impaired Nonaccrual Loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	320	337
Disbursements (Payments)	(21)	(17)
TDR ending balance	299	320
TDR, Related Allowance		16
Impaired Nonaccrual Loans [Member] \| Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	2,798	2,878
Disbursements (Payments)	(1,402)	(163)
Charge offs	(3)
Reclassifications/Transfer In/(Out)	(1,393)	83
TDR ending balance		2,798
TDR, Related Allowance		320
Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	8,663	13,326
New TDRs	41
Disbursements (Payments)	(850)	(755)
Charge offs		(397)
Reclassifications/Transfer In/(Out)		(154)
Payoffs	(353)	(3,357)
TDR ending balance	7,501	8,663
TDR, Related Allowance	199	220
Impaired Accruing Restructured Loans [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	4,454	4,536
New TDRs	41
Disbursements (Payments)	(101)	(85)
Reclassifications/Transfer In/(Out)		541
Payoffs	(353)	(538)
TDR ending balance	4,041	4,454
TDR, Related Allowance	180	183
Impaired Accruing Restructured Loans [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	4,158	4,818
Disbursements (Payments)	(739)	(441)
Payoffs		(219)
TDR ending balance	3,419	4,158
TDR, Related Allowance	19	37
Impaired Accruing Restructured Loans [Member] \| Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	51	3,972
Disbursements (Payments)	(10)	(229)
Charge offs		(397)
Reclassifications/Transfer In/(Out)		(695)
Payoffs		(2,600)
TDR ending balance	$ 41	$ 51

Financing receivables, impaired, troubled debt restructuring, balance.

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- Definition

Financing receivables, impaired, troubled debt restructuring, disbursements (payments received).

+ References

No definition available.

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- Definition

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+ References

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- Definition

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+ References

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Financing receivables, impaired, troubled debt restructuring period increase (decrease).

+ References

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- Definition

Financing receivables, impaired, troubled debt restructuring related allowance.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554

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