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Junior Subordinated Debentures (Details) (USD $)
12 Months Ended
Dec. 31, 2007
Dec. 31, 2014
May 01, 2014
Dec. 31, 2013
Debt Instrument [Line Items]        
Junior subordinated debentures   $ 19,082,000us-gaap_JuniorSubordinatedNotes $ 18,900,000us-gaap_JuniorSubordinatedNotes $ 0us-gaap_JuniorSubordinatedNotes
Issued amount $ 25,000,000.0us-gaap_DebtInstrumentFaceAmount      
Debt term 30 years      
Interest rate at end of period   1.82%us-gaap_DebtInstrumentInterestRateAtPeriodEnd    
Junior Subordinated Debentures [Member]        
Debt Instrument [Line Items]        
Weighted average rate   3.59%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_JuniorSubordinatedDebtMember
   
LIBOR [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.56%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember