XML 17 R54.htm IDEA: XBRL DOCUMENT v2.4.1.9
Investment Securities - Investments by contractual maturity (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities    
Within one year, amortized cost $ 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost  
Within one year, estimated fair value 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue  
After one year through five years, amortized cost 2,904,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost  
After one year through five years, estimated fair value 3,167,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue  
After five years through ten years, amortized cost 17,592,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost  
After five years through ten years, estimated fair value 18,457,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue  
After ten years, amortized cost 122,847,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost  
After ten years, estimated fair value 127,671,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue  
Total securities with single maturity date, amortized cost 143,343,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis  
Total securities with single maturity date, estimated fair value 149,295,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate  
Debt securities, amortized cost 423,639,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost  
Available-for-sale investment securities 432,535,000us-gaap_AvailableForSaleSecurities 443,224,000us-gaap_AvailableForSaleSecurities
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
After ten years, Amortized Cost 31,964,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount  
After ten years, Estimated Fair Value 35,096,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue  
U.S. Government agencies    
Schedule of Available-for-sale Securities    
Investment securities not due at a single maturity date, amortized cost 33,088,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember		  
Investment securities not due at a single maturity date, estimated fair value 33,090,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember		  
U.S. Government agencies collateralized by residential mortgage obligations    
Schedule of Available-for-sale Securities    
Investment securities not due at a single maturity date, amortized cost 236,629,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember		  
Investment securities not due at a single maturity date, estimated fair value 237,872,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember		  
Private label residential mortgage backed securities    
Schedule of Available-for-sale Securities    
Investment securities not due at a single maturity date, amortized cost 3,079,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember		  
Investment securities not due at a single maturity date, estimated fair value 4,693,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember		  
Other equity securities    
Schedule of Available-for-sale Securities    
Investment securities not due at a single maturity date, amortized cost 7,500,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember		  
Investment securities not due at a single maturity date, estimated fair value $ 7,585,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember