Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Tax expense (benefit)	$ 701us-gaap_IncomeTaxExpenseBenefit	$ 697us-gaap_IncomeTaxExpenseBenefit
Net of tax amount	2,136us-gaap_NetIncomeLoss	2,296us-gaap_NetIncomeLoss
Unrealized holding gains (losses) arising during the period, tax expense	836	1,121
Unrealized holding gains (losses) arising during the period, net of tax amount	1,624	2,176
Reclassification adjustment for (gains) losses included in net income, tax expense (benefit)	(171)	(212)
Reclassification adjustment for (gains) losses included in net income, net of tax amount	(332)	(410)
Other comprehensive (loss) income, tax expense (benefit)	665us-gaap_OtherComprehensiveIncomeLossTax	909us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive (loss) income, net of tax amount	1,292	1,766
Total comprehensive income, tax expense (benefit)	1,366qnbc_ComprehensiveIncomeLossTax	1,606qnbc_ComprehensiveIncomeLossTax
Total comprehensive income, net of tax amount	$ 3,428	$ 4,062

Amount of tax on comprehensive income (loss).

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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