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Loans, Net Summary of loan classifications by class of loan (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Summary of loan classifications by class of loan [Abstract]      
Summary of loan quality by class of loan $ 754,846us-gaap_LoansAndLeasesReceivableGrossCarryingAmount [1] $ 728,480us-gaap_LoansAndLeasesReceivableGrossCarryingAmount $ 709,477us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
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Summary of loan classifications by class of loan [Abstract]      
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Summary of loan classifications by class of loan [Abstract]      
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Summary of loan classifications by class of loan [Abstract]      
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Summary of loan classifications by class of loan [Abstract]      
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Summary of loan classifications by class of loan [Abstract]      
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= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		  
Consumer Loans [Member] | Substandard [Member]      
Summary of loan classifications by class of loan [Abstract]      
Summary of loan quality by class of loan 3,019us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 44us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		  
Consumer Loans [Member] | Doubtful [Member]      
Summary of loan classifications by class of loan [Abstract]      
Summary of loan quality by class of loan 3us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		 37us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember		  
Consumer Loans [Member] | Loss [Member]      
Summary of loan classifications by class of loan [Abstract]      
Summary of loan quality by class of loan $ 17us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_UnlikelyToBeCollectedFinancingReceivableMember		 $ 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_UnlikelyToBeCollectedFinancingReceivableMember		  
[1] net deferred loan costs and premiums of $3.0 million and $2.4 million, respectively.