XML 63 R41.htm IDEA: XBRL DOCUMENT v2.4.1.9
FAIR VALUE (Details)
 3 Months Ended
Mar. 31, 2015
item
FAIR VALUE.  
Number of times a sample of prices supplied by the pricing agent is validated by comparison to prices obtained from other third party sources 2msfg_NumberOfTimesInAYearSampleOfPricesSuppliedByPricingAgentIsValidatedByComparisonFromOtherThirdPartySources
Minimum | Impaired Loans  
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value  
Adjustments for differences between the comparable sales and income (as a percent) 0.00%us-gaap_FairValueInputsComparabilityAdjustments
/ us-gaap_FairValueByAssetClassAxis
= msfg_ImpairedFinancingReceivablesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Minimum | Other real estate owned  
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value  
Adjustments for differences between the comparable sales and income (as a percent) 0.00%us-gaap_FairValueInputsComparabilityAdjustments
/ us-gaap_FairValueByAssetClassAxis
= msfg_OtherRealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum | Impaired Loans  
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value  
Adjustments for differences between the comparable sales and income (as a percent) 50.00%us-gaap_FairValueInputsComparabilityAdjustments
/ us-gaap_FairValueByAssetClassAxis
= msfg_ImpairedFinancingReceivablesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum | Other real estate owned  
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value  
Adjustments for differences between the comparable sales and income (as a percent) 50.00%us-gaap_FairValueInputsComparabilityAdjustments
/ us-gaap_FairValueByAssetClassAxis
= msfg_OtherRealEstateOwnedMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember