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Regulatory Matters (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital $ 79,491us-gaap_Capital $ 74,505us-gaap_Capital
Capital to Risk Weighted Assets 15.92%us-gaap_CapitalToRiskWeightedAssets 16.40%us-gaap_CapitalToRiskWeightedAssets
Capital Required for Capital Adequacy 39,951us-gaap_CapitalRequiredForCapitalAdequacy 36,338us-gaap_CapitalRequiredForCapitalAdequacy
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Tier One Risk Based Capital 74,419us-gaap_TierOneRiskBasedCapital 69,727us-gaap_TierOneRiskBasedCapital
Tier One Risk Based Capital to Risk Weighted Assets 14.90%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets 15.35%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Tier One Risk Based Capital Required for Capital Adequacy 19,975us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy 18,169us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Tier One Leverage Capital 74,419us-gaap_TierOneLeverageCapital 69,727us-gaap_TierOneLeverageCapital
Tier One Leverage Capital to Average Assets 10.55%us-gaap_TierOneLeverageCapitalToAverageAssets 10.61%us-gaap_TierOneLeverageCapitalToAverageAssets
Tier One Leverage Capital Required for Capital Adequacy 28,215us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy 26,295us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
DNB First, N.A. [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital 79,510us-gaap_Capital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 74,527us-gaap_Capital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Capital to Risk Weighted Assets 15.93%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 16.42%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Capital Required for Capital Adequacy 39,919us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 36,306us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Capital Required to be Well Capitalized 49,898us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 45,381us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital 74,438us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 69,749us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital to Risk Weighted Assets 14.92%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 15.37%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital Required for Capital Adequacy 19,959us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 18,152us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital Required to be Well Capitalized 29,939us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 27,229us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital 74,438us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 69,749us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital to Average Assets 10.56%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 10.60%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital Required for Capital Adequacy 28,198us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 26,314us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital Required to be Well Capitalized $ 35,247us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 $ 32,893us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember