A valuation allowance for financing receivables that are expected to be uncollectible.

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_LoansAndLeasesReceivableDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

+ Details

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Balance Type:	debit
Period Type:	duration

- Details

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- Details

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Data Type:	na
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- Details

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- Details

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- Details

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- Details

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- Details

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Loans (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses:
Beginning Balance				$ 10,976				$ 10,515				$ 9,860	$ 10,976	$ 10,515	$ 9,860
Charge-offs													(2,375)	(1,217)	(482)
Recoveries													211	273	127
Provisions	$ 805	$ 450	$ 375	500	$ 465	$ 40	$ 400	500	$ 30	$ 224	$ 376	380	2,130	1,405	1,010
Ending Balance	10,942				10,976				10,515				10,942	10,976	10,515
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				6,882				6,451				5,212	6,882	6,451	5,212
Charge-offs													(148)	(268)	(217)
Recoveries													15	10	63
Provisions													649	689	1,393
Ending Balance	7,398				6,882				6,451				7,398	6,882	6,451
Residential First Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				755				1,144				1,406	755	1,144	1,406
Charge-offs													0	(115)	0
Recoveries													0	0	0
Provisions													(291)	(274)	(262)
Ending Balance	464				755				1,144				464	755	1,144
Residential Rentals Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				498				512				362	498	512	362
Charge-offs													(53)	(84)	(42)
Recoveries													46	0	0
Provisions													(94)	70	192
Ending Balance	397				498				512				397	498	512
Construction And Land Development Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				310				462				941	310	462	941
Charge-offs													(329)	0	(26)
Recoveries													0	0	0
Provisions													292	(152)	(453)
Ending Balance	273				310				462				273	310	462
Home Equity And Second Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				133				162				138	133	162	138
Charge-offs													(28)	(7)	(14)
Recoveries													6	18	1
Provisions													38	(40)	37
Ending Balance	149				133				162				149	133	162
Commercial Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				1,482				1,013				794	1,482	1,013	794
Charge-offs													(1,127)	(94)	(13)
Recoveries													40	189	1
Provisions													691	374	231
Ending Balance	1,086				1,482				1,013				1,086	1,482	1,013
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				6				7				3	6	7	3
Charge-offs													(5)	(2)	(2)
Recoveries													2	0	0
Provisions													7	1	6
Ending Balance	10				6				7				10	6	7
Commercial Equipment Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				910				$ 764				$ 1,004	910	764	1,004
Charge-offs													(685)	(647)	(168)
Recoveries													102	56	62
Provisions													838	737	(134)
Ending Balance	1,165				910				$ 764				1,165	910	$ 764
PCI Loans [Member]
Allowance for loan losses:
Beginning Balance				$ 0									0
Charge-offs													0
Recoveries													0
Provisions													0
Ending Balance	$ 0				$ 0								$ 0	$ 0