XML 23 R78.htm IDEA: XBRL DOCUMENT v2.4.1.9
Allowance For Loan Losses (Summary Of Net Unearned Income) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance $ 12,659us-gaap_FinancingReceivableAllowanceForCreditLosses $ 17,933us-gaap_FinancingReceivableAllowanceForCreditLosses $ 17,712us-gaap_FinancingReceivableAllowanceForCreditLosses
Charge-offs 4,833us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs 10,959us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs 8,817us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Recoveries 1,091us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery 1,185us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery 538us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Provision 2,250us-gaap_ProvisionForLoanLeaseAndOtherLosses 4,500us-gaap_ProvisionForLoanLeaseAndOtherLosses 8,500us-gaap_ProvisionForLoanLeaseAndOtherLosses
Ending balance 11,167us-gaap_FinancingReceivableAllowanceForCreditLosses 12,659us-gaap_FinancingReceivableAllowanceForCreditLosses 17,933us-gaap_FinancingReceivableAllowanceForCreditLosses
Allowance related to: Loans individually evaluated for impairment 815us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 4,400us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1  
Allowance related to: Loans collectively evaluated for impairment 10,352us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment 8,259us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment  
Total Allowance 11,167us-gaap_FinancingReceivableAllowanceForCreditLosses 12,659us-gaap_FinancingReceivableAllowanceForCreditLosses 17,933us-gaap_FinancingReceivableAllowanceForCreditLosses
Loans individually evaluated for impairment 48,416us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment 60,783us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment  
Loans collectively evaluated for impairment 982,593us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment 888,946us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment  
Total Loans 1,031,009us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 949,729us-gaap_LoansAndLeasesReceivableGrossCarryingAmount  
Land And Land Development [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 5,455us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
5,220us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Charge-offs 3,535us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
3,596us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
3,390us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
Recoveries 298us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
187us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
61us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
Provision 1,199us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
3,644us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Ending balance 3,417us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
5,455us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
5,220us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
Allowance related to: Loans individually evaluated for impairment 46us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
3,186us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Allowance related to: Loans collectively evaluated for impairment 3,371us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
2,269us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Total Allowance 3,417us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
5,455us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
5,220us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
Loans individually evaluated for impairment 14,308us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
25,269us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Loans collectively evaluated for impairment 53,573us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
46,184us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Total Loans 67,881us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
71,453us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_LandAndLandDevelopmentMember
 
Construction Loans [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
138us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Charge-offs 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
367us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
Recoveries 0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
Provision 158us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
131us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Ending balance 427us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
138us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
Allowance related to: Loans individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Allowance related to: Loans collectively evaluated for impairment 427us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
269us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Total Allowance 427us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
138us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
Loans individually evaluated for impairment 0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Loans collectively evaluated for impairment 28,591us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
15,155us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Total Loans 28,591us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
15,155us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConstructionLoansMember
 
Commercial Loan [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 1,324us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
783us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Charge-offs 390us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
723us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
1,273us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
Recoveries 34us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
12us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
13us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
Provision 236us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
1,252us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Ending balance 1,204us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
1,324us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
783us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
Allowance related to: Loans individually evaluated for impairment 81us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
406us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Allowance related to: Loans collectively evaluated for impairment 1,123us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
918us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Total Allowance 1,204us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
1,324us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
783us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
Loans individually evaluated for impairment 495us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
2,023us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Loans collectively evaluated for impairment 88,095us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
86,329us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Total Loans 88,590us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
88,352us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialLoanMember
 
Owner Occupied [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 969us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
1,387us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Charge-offs 11us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
1,031us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
636us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
Recoveries 40us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
8us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
33us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
Provision (71)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
605us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Ending balance 927us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
969us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
1,387us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
Allowance related to: Loans individually evaluated for impairment 286us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
306us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Allowance related to: Loans collectively evaluated for impairment 641us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
663us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Total Allowance 927us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
969us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
1,387us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
Loans individually evaluated for impairment 10,807us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
12,550us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Loans collectively evaluated for impairment 146,976us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
137,068us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Total Loans 157,783us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
149,618us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_OwnerOccupiedMember
 
Non Owner Occupied [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 641us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
3,269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Charge-offs 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
9us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
806us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
Recoveries 318us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
674us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
31us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
Provision 357us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
(3,293)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Ending balance 1,316us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
641us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
3,269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
Allowance related to: Loans individually evaluated for impairment 74us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
175us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Allowance related to: Loans collectively evaluated for impairment 1,242us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
466us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Total Allowance 1,316us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
641us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
3,269us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
Loans individually evaluated for impairment 6,507us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
5,832us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Loans collectively evaluated for impairment 310,629us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
274,958us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Total Loans 317,136us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
280,790us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonOwnerOccupiedMember
 
Non Jumbo [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 1,842us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
2,616us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Charge-offs 435us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
541us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
1,372us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
Recoveries 87us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
127us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
81us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
Provision (214)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
(360)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Ending balance 1,280us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
1,842us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
2,616us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
Allowance related to: Loans individually evaluated for impairment 282us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
256us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Allowance related to: Loans collectively evaluated for impairment 998us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
1,586us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Total Allowance 1,280us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
1,842us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
2,616us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
Loans individually evaluated for impairment 6,927us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
6,082us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Loans collectively evaluated for impairment 213,144us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
206,864us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Total Loans 220,071us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
212,946us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_NonJumboMember
 
Jumbo [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 1,888us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
3,942us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Charge-offs 65us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
4,741us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
737us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
Recoveries 163us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
6us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
86us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
Provision 95us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
2,681us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Ending balance 2,081us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
1,888us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
3,942us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
Allowance related to: Loans individually evaluated for impairment 46us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
37us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Allowance related to: Loans collectively evaluated for impairment 2,035us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
1,851us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Total Allowance 2,081us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
1,888us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
3,942us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
Loans individually evaluated for impairment 8,480us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
8,768us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Loans collectively evaluated for impairment 44,399us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
44,638us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Total Loans 52,879us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
53,406us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= smmf_JumboMember
 
Home Equity [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 173us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
425us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Charge-offs 14us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
77us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Recoveries 4us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
5us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
61us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Provision 24us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
(180)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Ending balance 187us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
173us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
425us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Allowance related to: Loans individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
22us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Allowance related to: Loans collectively evaluated for impairment 187us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
151us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Total Allowance 187us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
173us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
425us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
Loans individually evaluated for impairment 808us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
212us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Loans collectively evaluated for impairment 66,307us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
54,632us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Total Loans 67,115us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
54,844us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_HomeEquityMember
 
Consumer Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 47us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
131us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Charge-offs 265us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
79us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
136us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
Recoveries 74us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
79us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
95us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
Provision 241us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
(84)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Ending balance 97us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
47us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
131us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
Allowance related to: Loans individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
12us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Allowance related to: Loans collectively evaluated for impairment 97us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
35us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Total Allowance 97us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
47us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
131us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
Loans individually evaluated for impairment 84us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
47us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Loans collectively evaluated for impairment 19,372us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
19,842us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Total Loans 19,456us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
19,889us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ConsumerPortfolioSegmentMember
 
Other      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Beginning balance 51us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
22us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Charge-offs 118us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
162us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
95us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
Recoveries 73us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
87us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
77us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
Provision 225us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
104us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Ending balance 231us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
51us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
22us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
Allowance related to: Loans individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Allowance related to: Loans collectively evaluated for impairment 231us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
51us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Total Allowance 231us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
51us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
22us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
Loans individually evaluated for impairment 0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Loans collectively evaluated for impairment 11,507us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
3,276us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
 
Total Loans $ 11,507us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember
$ 3,276us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_UnallocatedFinancingReceivablesMember