XML 13 R48.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loans (Details 7) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Credit risk profile by internally assigned grade    
Loans $ 1,874,010us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome $ 1,868,550us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Pass    
Credit risk profile by internally assigned grade    
Loans 1,821,857us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 1,814,936us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Special mention    
Credit risk profile by internally assigned grade    
Loans 25,729us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 24,800us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Substandard    
Credit risk profile by internally assigned grade    
Loans 14,887us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 16,934us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 11,537us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 11,880us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Commercial and industrial    
Credit risk profile by internally assigned grade    
Loans 594,980us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember		 588,200us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
Commercial and industrial | Pass    
Credit risk profile by internally assigned grade    
Loans 574,010us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 563,028us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Commercial and industrial | Special mention    
Credit risk profile by internally assigned grade    
Loans 5,258us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 6,215us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Commercial and industrial | Substandard    
Credit risk profile by internally assigned grade    
Loans 8,670us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 11,717us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Commercial and industrial | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 7,042us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 7,240us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialAndIndustrialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Construction and development excluding undeveloped land    
Credit risk profile by internally assigned grade    
Loans 99,846us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember		 95,733us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
Construction and development excluding undeveloped land | Pass    
Credit risk profile by internally assigned grade    
Loans 92,587us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 88,389us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Construction and development excluding undeveloped land | Special mention    
Credit risk profile by internally assigned grade    
Loans 4,798us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 4,867us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Construction and development excluding undeveloped land | Substandard    
Credit risk profile by internally assigned grade    
Loans 1,945us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 1,720us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Construction and development excluding undeveloped land | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 516us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 757us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_ConstructionAndDevelopmentExcludingUndevelopedLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Undeveloped land    
Credit risk profile by internally assigned grade    
Loans 19,995us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember		 21,268us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
Undeveloped land | Pass    
Credit risk profile by internally assigned grade    
Loans 19,309us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 20,578us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Undeveloped land | Special mention    
Credit risk profile by internally assigned grade    
Loans 527us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 530us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Undeveloped land | Substandard    
Credit risk profile by internally assigned grade    
Loans 159us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 160us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_UndevelopmentLandPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Real estate mortgage    
Credit risk profile by internally assigned grade    
Loans 1,129,941us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember		 1,133,953us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
Real estate mortgage | Pass    
Credit risk profile by internally assigned grade    
Loans 1,106,851us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 1,113,697us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Real estate mortgage | Special mention    
Credit risk profile by internally assigned grade    
Loans 15,072us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 13,112us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Real estate mortgage | Substandard    
Credit risk profile by internally assigned grade    
Loans 4,113us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 3,337us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Real estate mortgage | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 3,905us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 3,807us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_RealEstateMortgagePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Commercial investment    
Credit risk profile by internally assigned grade    
Loans 486,371us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember		 487,822us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
Commercial investment | Pass    
Credit risk profile by internally assigned grade    
Loans 481,205us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 482,415us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Commercial investment | Special mention    
Credit risk profile by internally assigned grade    
Loans 4,753us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 4,991us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Commercial investment | Substandard    
Credit risk profile by internally assigned grade    
Loans 179us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 181us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Commercial investment | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 234us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 235us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_CommercialInvestmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Owner occupied commercial    
Credit risk profile by internally assigned grade    
Loans 341,454us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember		 340,982us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
Owner occupied commercial | Pass    
Credit risk profile by internally assigned grade    
Loans 326,208us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 328,385us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Owner occupied commercial | Special mention    
Credit risk profile by internally assigned grade    
Loans 8,550us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 6,942us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Owner occupied commercial | Substandard    
Credit risk profile by internally assigned grade    
Loans 3,934us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 3,156us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
Owner occupied commercial | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 2,762us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 2,499us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OwnerOccupiedCommercialMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
1-4 family residential    
Credit risk profile by internally assigned grade    
Loans 191,004us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember		 195,102us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
1-4 family residential | Pass    
Credit risk profile by internally assigned grade    
Loans 188,536us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 192,950us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
1-4 family residential | Special mention    
Credit risk profile by internally assigned grade    
Loans 1,668us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 1,129us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
1-4 family residential | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 800us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 1,023us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_OneToFourFamilyResidentialMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Home equity - first lien    
Credit risk profile by internally assigned grade    
Loans 45,288us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityFirstLienMember		 43,779us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityFirstLienMember
Home equity - first lien | Pass    
Credit risk profile by internally assigned grade    
Loans 45,288us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityFirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 43,765us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityFirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Home equity - first lien | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans   14us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityFirstLienMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Home equity - junior lien    
Credit risk profile by internally assigned grade    
Loans 65,824us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember		 66,268us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
Home equity - junior lien | Pass    
Credit risk profile by internally assigned grade    
Loans 65,614us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 66,182us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Home equity - junior lien | Special mention    
Credit risk profile by internally assigned grade    
Loans 101us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 50us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Home equity - junior lien | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans 109us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 36us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= sybt_HomeEquityJuniorLienMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember
Consumer    
Credit risk profile by internally assigned grade    
Loans 29,248us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 29,396us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
Consumer | Pass    
Credit risk profile by internally assigned grade    
Loans 29,100us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 29,244us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
Consumer | Special mention    
Credit risk profile by internally assigned grade    
Loans 74us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 76us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
Consumer | Substandard non-performing    
Credit risk profile by internally assigned grade    
Loans $ 74us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember		 $ 76us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= sybt_SubstandardNonperformingFinancingReceivableMember