XML 40 R35.htm IDEA: XBRL DOCUMENT v2.4.1.9
LOANS AND ALLOWANCE (Details 4) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual $ 13,977us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus $ 13,596us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 1,969,463us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 1,957,765us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
30-59 Days Past Due 7,254us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue 8,439us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
60-89 Days Past Due 1,467us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue 2,901us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Greater than 90 Days Past Due 7,482us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue 7,325us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Total Past Due 16,203us-gaap_FinancingReceivableRecordedInvestmentPastDue 18,665us-gaap_FinancingReceivableRecordedInvestmentPastDue
Loans Not Past Due 1,953,260msfg_FinancingReceivableRecordedInvestmentNotPastDue 1,939,100msfg_FinancingReceivableRecordedInvestmentNotPastDue
Accrued interest 5,838us-gaap_InterestReceivable 5,605us-gaap_InterestReceivable
Commercial    
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 333,038us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
322,430us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Commercial | Commercial and industrial    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 1,062us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
479us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 287,524us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
275,646us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
30-59 Days Past Due 101us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
441us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
60-89 Days Past Due   75us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Greater than 90 Days Past Due 626us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
210us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Total Past Due 727us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
726us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Loans Not Past Due 286,797msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
274,920msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Commercial | Agricultural    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual   150us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 45,514us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
46,784us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Loans Not Past Due 45,514msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
46,784msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Commercial Real Estate    
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 882,250us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
879,868us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate | Farm    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 682us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
692us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 74,172us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
76,849us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Greater than 90 Days Past Due 327us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
327us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Total Past Due 327us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
327us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Loans Not Past Due 73,845msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
76,522msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate | Hotel    
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 62,742us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_HotelReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
74,962us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_HotelReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Loans Not Past Due 62,742msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_HotelReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
74,962msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_HotelReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate | Construction and development    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual   78us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 75,942us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
61,640us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
60-89 Days Past Due   78us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Total Past Due   78us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Loans Not Past Due 75,942msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
61,562msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Commercial Real Estate | Other    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 3,863us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
3,744us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 669,394us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
666,417us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
30-59 Days Past Due 728us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
933us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
60-89 Days Past Due 432us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
755us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Greater than 90 Days Past Due 1,999us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
1,919us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Total Past Due 3,159us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
3,607us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Loans Not Past Due 666,235msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
662,810msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
Residential    
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 708,943us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
709,495us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential | 1-4 family    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 6,258us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
6,428us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 435,667us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
435,336us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
30-59 Days Past Due 5,827us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
6,217us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
60-89 Days Past Due 696us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
1,719us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Greater than 90 Days Past Due 2,927us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
3,186us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Total Past Due 9,450us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
11,122us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Loans Not Past Due 426,217msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
424,214msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Residential | Home equity    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 1,952us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
1,841us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 273,276us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
274,159us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
30-59 Days Past Due 532us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
751us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
60-89 Days Past Due 315us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
250us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Greater than 90 Days Past Due 1,466us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
1,521us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Total Past Due 2,313us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
2,522us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Loans Not Past Due 270,963msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
271,637msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
Consumer    
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 45,232us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
45,972us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Consumer | Direct    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual 160us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
177us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 44,675us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
45,360us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
30-59 Days Past Due 66us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
91us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
60-89 Days Past Due 22us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
17us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Greater than 90 Days Past Due 137us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
162us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Total Past Due 225us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
270us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Loans Not Past Due 44,450msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
45,090msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_DirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Consumer | Indirect    
Recorded investment in nonaccrual and loans past due over 90 days still on accrual and aging of recorded investment in past due    
Non-accrual   7us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Aging of the recorded investment in past due loans    
Total ending loan balance excluding accrued interest 557us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
612us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
30-59 Days Past Due   6us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
60-89 Days Past Due 2us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
7us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Total Past Due 2us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
13us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Loans Not Past Due $ 555msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
$ 599msfg_FinancingReceivableRecordedInvestmentNotPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_IndirectMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember