Name:	qnbc_FairValueDiscountRate
Namespace Prefix:	qnbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Liquidation expenses unobservable inputs used to determine fair value.

No definition available.

Name:	qnbc_FairValueInputsLiquidationExpenses
Namespace Prefix:	qnbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

No definition available.

Name:	us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Name:	us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

Name:	us-gaap_FairValueInputsComparabilityAdjustments
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_FairValueByAssetClassAxis=qnbc_ImpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_ValuationTechniqueAxis=qnbc_AppraisalValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_ValuationTechniqueAxis=qnbc_CommercialVehicleAndEquipmentGuidesValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_ValuationTechniqueAxis=qnbc_AgreementOfSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_FairValueByAssetClassAxis=qnbc_MortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
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