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Loans and Asset Quality Information (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Oct. 01, 2017	Mar. 03, 2017
Recorded loans with a fair value				$ 606,200	$ 497,500
Payments that exceeded the initial carrying amount on purchased impaired loans	$ 225	$ 848
Discount accretion loan interest income - purchased impaired loans paid off	184	775
Additional loan interest income - purchased impaired loans paid off	41	73
Real estate - mortgage - residential (1-4 family) first mortgages [Member]
Nonaccrual loans in process of foreclosure	1,400		$ 800
Purchased Impaired Loans [Member]
Recorded loans with a fair value				$ 9,900	$ 19,300
Purchased Impaired Loans [Member] | Carolina Bank Holdings, Inc. [Member] | 90 Days or More Past Due [Member]
Recorded loans with a fair value	$ 600	$ 400	$ 600

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- Definition

Additional loan interest income.

+ References

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- Definition

Discount accretion loan interest income.

+ References

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- Definition

Refers to payments that exceeded initial carrying values of purchased impaired laons.

+ References

No definition available.

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524

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