XML 131 R74.htm IDEA: XBRL DOCUMENT v2.4.1.9
Portfolio Loans - Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs $ 2,433,916us-gaap_LoansAndLeasesReceivableGrossCarryingAmount $ 2,137,313us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Non-Covered Loans    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 2,433,021us-gaap_NotesReceivableGross
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 2,136,292us-gaap_NotesReceivableGross
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Portfolio loans, including unearned loan costs 2,433,916us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 2,137,313us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 1,270,259us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 1,041,576us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Commercial Real Estate Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 357,503us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 341,631us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Commercial Real Estate Investor Owned    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 413,026us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 437,688us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 144,773us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 117,032us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Residential Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 185,252us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 158,527us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Non-Covered Loans | Consumer & Other    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 62,208us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 39,838us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Portfolio loans, including unearned loan costs 63,103us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 40,859us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 2,229,430us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 1,924,230us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 1,167,751us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 977,199us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Commercial Real Estate Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 334,347us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 306,321us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Commercial Real Estate Investor Owned    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 372,818us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 368,433us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 123,260us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 87,812us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Residential Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 168,543us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 143,613us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Pass (1-6) | Non-Covered Loans | Consumer & Other    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 62,711us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 40,852us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 128,484us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 134,410us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 62,315us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 40,265us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Commercial Real Estate Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 18,025us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 26,500us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Commercial Real Estate Investor Owned    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 24,088us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 42,227us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 12,993us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 17,175us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Residential Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 11,012us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 8,240us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Watch (7) | Non-Covered Loans | Consumer & Other    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 51us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 3us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 76,002us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 78,032us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 40,193us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 23,934us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Commercial Real Estate Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 5,131us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 8,810us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Commercial Real Estate Investor Owned    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 16,120us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 27,028us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 8,520us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 11,582us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Residential Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 5,697us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 6,674us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Substandard (8) | Non-Covered Loans | Consumer & Other    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 341us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 4us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 641us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 178us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Commercial Real Estate Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Commercial Real Estate Investor Owned    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 463us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConstructionAndLandDevelopmentFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Residential Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio Loans 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 0us-gaap_NotesReceivableGross
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ResidentialRealEstateFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember
Doubtful (9) | Non-Covered Loans | Consumer & Other    
Financing Receivable, Recorded Investment [Line Items]    
Portfolio loans, including unearned loan costs $ 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember		 $ 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsc_ConsumerAndOtherPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ efsc_LoansByMajorCategoryAxis
= efsc_NoncoveredLoansMember