XML 30 R76.htm IDEA: XBRL DOCUMENT v2.4.1.9
FAIR VALUE (Details 4) (Non-recurring basis, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Assets:    
Total impaired loans $ 1,290msfg_ImpairedFinancingReceivableFairValueDisclosure $ 5,789msfg_ImpairedFinancingReceivableFairValueDisclosure
Impaired servicing rights 1,854us-gaap_ServicingAssetAtFairValueAmount 1,794us-gaap_ServicingAssetAtFairValueAmount
Other real estate owned/assets held for sale 462msfg_OtherRealEstateAndForeclosedAssetsNet 1,014msfg_OtherRealEstateAndForeclosedAssetsNet
Recorded investment of impaired loans 2,056msfg_ImpairedFinancingReceivableGrossCarryingAmount 6,879msfg_ImpairedFinancingReceivableGrossCarryingAmount
Valuation allowance of impaired loans 766msfg_ImpairedFinancingReceivableValuationAllowance 1,090msfg_ImpairedFinancingReceivableValuationAllowance
Additional provision for loan losses 181msfg_ImpairedFinancingReceivableAdditionalProvision 432msfg_ImpairedFinancingReceivableAdditionalProvision
Gross outstanding balance of servicing rights 2,254us-gaap_ServicingAssetAtAmortizedValue 2,169us-gaap_ServicingAssetAtAmortizedValue
Valuation allowance of servicing rights 400us-gaap_ServicingAssetAtAmortizedValueValuationAllowance 375us-gaap_ServicingAssetAtAmortizedValueValuationAllowance
Servicing rights (recovery) charge included in earnings (25)us-gaap_ServicingAssetAtAmortizedValueAmortization1 750us-gaap_ServicingAssetAtAmortizedValueAmortization1
Write-down of other real estate owned/assets held for sale 121msfg_OtherRealEstateAndForeclosedAssetsWriteDown 175msfg_OtherRealEstateAndForeclosedAssetsWriteDown
Breakdown of properties by portfolio class    
Gross outstanding balance of other real estate owned/assets held for sale 697msfg_OtherRealEstateAndForeclosedAssetsGross 1,362msfg_OtherRealEstateAndForeclosedAssetsGross
Valuation allowance of other real estate owned/assets held for sale 235msfg_RealEstateOwnedValuationAllowanceAdjustment 348msfg_RealEstateOwnedValuationAllowanceAdjustment
Other real estate owned/assets held for sale 462msfg_OtherRealEstateAndForeclosedAssetsNet 1,014msfg_OtherRealEstateAndForeclosedAssetsNet
Commercial and industrial
   
Assets:    
Total impaired loans   76msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Recorded investment of impaired loans 12msfg_ImpairedFinancingReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of impaired loans 12msfg_ImpairedFinancingReceivableValuationAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Farm
   
Assets:    
Total impaired loans 55msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
375msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned/assets held for sale 55msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Recorded investment of impaired loans 76msfg_ImpairedFinancingReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of impaired loans 21msfg_ImpairedFinancingReceivableValuationAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale 55msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
1-4 family residential mortgage loans
   
Assets:    
Total impaired loans   226msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned/assets held for sale 150msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Breakdown of properties by portfolio class    
Gross outstanding balance of other real estate owned/assets held for sale 201msfg_OtherRealEstateAndForeclosedAssetsGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of other real estate owned/assets held for sale 51msfg_RealEstateOwnedValuationAllowanceAdjustment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Other real estate owned/assets held for sale 150msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Other
   
Assets:    
Total impaired loans 1,235msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
5,112msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned/assets held for sale 1,235msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Recorded investment of impaired loans 1,818msfg_ImpairedFinancingReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of impaired loans 583msfg_ImpairedFinancingReceivableValuationAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale 1,235msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Construction and development
   
Assets:    
Other real estate owned/assets held for sale 21msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
522msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Gross outstanding balance of other real estate owned/assets held for sale 30msfg_OtherRealEstateAndForeclosedAssetsGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of other real estate owned/assets held for sale 9msfg_RealEstateOwnedValuationAllowanceAdjustment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Other real estate owned/assets held for sale 21msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
522msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Home equity
   
Assets:    
Other real estate owned/assets held for sale   67msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale   67msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate
   
Assets:    
Other real estate owned/assets held for sale 291msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
425msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Gross outstanding balance of other real estate owned/assets held for sale 466msfg_OtherRealEstateAndForeclosedAssetsGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of other real estate owned/assets held for sale 175msfg_RealEstateOwnedValuationAllowanceAdjustment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Other real estate owned/assets held for sale 291msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
425msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Agricultural
   
Assets:    
Recorded investment of impaired loans 150msfg_ImpairedFinancingReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Valuation allowance of impaired loans 150msfg_ImpairedFinancingReceivableValuationAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_AgriculturalMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Level 3
   
Assets:    
Total impaired loans 1,290msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
5,789msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Impaired servicing rights 1,854us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
1,794us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned/assets held for sale 462msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
1,014msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale 462msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
1,014msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | Commercial and industrial
   
Assets:    
Total impaired loans   76msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_CommercialAndIndustrialLoanMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | Farm
   
Assets:    
Total impaired loans 55msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
375msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_FarmReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | 1-4 family residential mortgage loans
   
Assets:    
Total impaired loans   226msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned/assets held for sale 150msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale 150msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_Family1To4Member
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
 
Level 3 | Other
   
Assets:    
Total impaired loans 1,235msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
5,112msfg_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_OtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | Construction and development
   
Assets:    
Other real estate owned/assets held for sale 21msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
522msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale 21msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
522msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= msfg_ConstructionAndDevelopmentReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | Home equity
   
Assets:    
Other real estate owned/assets held for sale   67msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale   67msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Level 3 | Other real estate
   
Assets:    
Other real estate owned/assets held for sale 291msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
425msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Breakdown of properties by portfolio class    
Other real estate owned/assets held for sale $ 291msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
$ 425msfg_OtherRealEstateAndForeclosedAssetsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstateOtherReceivableMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember