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Condensed Financial Statements of Parent Company (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 1,556us-gaap_NetIncomeLoss	$ 1,554us-gaap_NetIncomeLoss	$ 1,337us-gaap_NetIncomeLoss	$ 1,248us-gaap_NetIncomeLoss	$ 1,346us-gaap_NetIncomeLoss	$ 1,201us-gaap_NetIncomeLoss	$ 1,312us-gaap_NetIncomeLoss	$ 1,235us-gaap_NetIncomeLoss	$ 5,695us-gaap_NetIncomeLoss	$ 5,094us-gaap_NetIncomeLoss	$ 4,262us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash from operating activities:
Amortization									1,493us-gaap_AdjustmentForAmortization	1,636us-gaap_AdjustmentForAmortization	1,569us-gaap_AdjustmentForAmortization
Net gain on sale of securities									(311)us-gaap_GainLossOnSaleOfSecuritiesNet	(137)us-gaap_GainLossOnSaleOfSecuritiesNet	(419)us-gaap_GainLossOnSaleOfSecuritiesNet
Changes in other assets									(380)us-gaap_IncreaseDecreaseInOtherOperatingAssets	289us-gaap_IncreaseDecreaseInOtherOperatingAssets	667us-gaap_IncreaseDecreaseInOtherOperatingAssets
Changes in other liabilities									985us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	(667)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	4us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash from operating activities									7,473us-gaap_NetCashProvidedByUsedInOperatingActivities	10,364us-gaap_NetCashProvidedByUsedInOperatingActivities	9,642us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:
Sales of securities									24,766us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities	8,790us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities	9,369us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Purchases of securities									(41,770)us-gaap_PaymentsToAcquireAvailableForSaleSecurities	(40,687)us-gaap_PaymentsToAcquireAvailableForSaleSecurities	(69,564)us-gaap_PaymentsToAcquireAvailableForSaleSecurities
Net cash from investing activities									(38,668)us-gaap_NetCashProvidedByUsedInInvestingActivities	(13,438)us-gaap_NetCashProvidedByUsedInInvestingActivities	(16,643)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:
Issuance of common stock									132us-gaap_ProceedsFromIssuanceOfCommonStock	130us-gaap_ProceedsFromIssuanceOfCommonStock	123us-gaap_ProceedsFromIssuanceOfCommonStock
Repurchase of common stock									(203)us-gaap_PaymentsForRepurchaseOfCommonStock	(192)us-gaap_PaymentsForRepurchaseOfCommonStock	(75)us-gaap_PaymentsForRepurchaseOfCommonStock
Cash dividends paid									(1,945)us-gaap_PaymentsOfDividends	(1,780)us-gaap_PaymentsOfDividends	(1,648)us-gaap_PaymentsOfDividends
Net cash from financing activities									27,366us-gaap_NetCashProvidedByUsedInFinancingActivities	4,519us-gaap_NetCashProvidedByUsedInFinancingActivities	8,910us-gaap_NetCashProvidedByUsedInFinancingActivities
Parent Company [Member]
Cash flows from operating activities:
Net income									5,695us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	5,094us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	4,262us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Adjustments to reconcile net income to net cash from operating activities:
Equity in undistributed net income of subsidiary									(2,992)us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,742)us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,596)us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Amortization									3us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net expense of restricted stock units									48us-gaap_RestrictedStockExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	11us-gaap_RestrictedStockExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net gain on sale of securities									(26)us-gaap_GainLossOnSaleOfSecuritiesNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1)us-gaap_GainLossOnSaleOfSecuritiesNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Changes in other assets									(125)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Changes in other liabilities									(35)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	36us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(10)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash from operating activities									2,568us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2,399us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	1,657us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash flows from investing activities:
Sales of securities									1,184us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	70us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Purchases of securities									(1,565)us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(125)us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(409)us-gaap_PaymentsToAcquireAvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash from investing activities									(381)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(55)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(409)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash flows from financing activities:
Issuance of common stock									132us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	130us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	123us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Repurchase of common stock									(203)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(192)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(75)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash dividends paid									(1,945)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,780)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,648)us-gaap_PaymentsOfDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash from financing activities									(2,016)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,842)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,600)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net change in cash									171us-gaap_CashPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	502us-gaap_CashPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(352)us-gaap_CashPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash, beginning				637us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember				135us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	637us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	135us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	487us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash, ending	$ 808us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember				$ 637us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember				$ 808us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	$ 637us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	$ 135us-gaap_Cash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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The cash inflow from the additional capital contribution to the entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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