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Loans and Asset Quality Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Mar. 03, 2017
Accretion of loan discount			$ 1,908
Recorded loans with a fair value				$ 497,400
Remaining accretable yield associated with PCI loans	$ 3,500	$ 0
Accretable Yield recognized	85	0
Accretion of loan discount resolved	443
Additional loan interest income resolved	295
Real estate - mortgage - residential (1-4 family) first mortgages [Member]
Nonaccrual loans in process of foreclosure	1,600		$ 1,700
Carolina Bank Holdings, Inc. [Member]
Recorded loans with a fair value				19,300
Purchased Impaired Loans [Member]
Accretion of loan discount		39
Payments that exceeded the initial carrying amount on purchased impaired loans		46
Additional loan interest income		$ 7
Recorded loans with a fair value				$ 19,300
Remaning discount	402
Purchased Impaired Loans [Member] | Carolina Bank Holdings, Inc. [Member]
Recorded loans with a fair value	1,700
Non-Covered Purchased Nonimpaired Loans [Member]
Accretion of loan discount	1,360
Remaining loan discount for non-covered purchased accruing loans	$ 18,410

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Accretable Yield recognized.

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Accretion of loan discount resolved during the period.

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Additional loan interest income.

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Nonaccrual loans that are currently in the process of foreclosure.

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Remaining accretable yield associated with PCI loans.

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Remaining loan discount for non-covered purchased accruing loans.

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Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Glossary Loan
-URI http://asc.fasb.org/extlink&oid=6517073

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