Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearEight
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States the average interest rate applicable to Federal Home Loan Bank advances due eleven years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearEleven
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States the average interest rate applicable to Federal Home Loan Bank advances due four years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearFour
Namespace Prefix:	sybt_
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States the average interest rate applicable to Federal Home Loan Bank advances due nine years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearNine
Namespace Prefix:	sybt_
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States the average interest rate applicable to Federal Home Loan Bank advances due seven years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearSeven
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States the average interest rate applicable to Federal Home Loan Bank advances due six years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearSix
Namespace Prefix:	sybt_
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States the average interest rate applicable to Federal Home Loan Bank advances due ten years from the balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAmountDueInYearTen
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the eighth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryDueInYearEight
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the eleventh fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryDueInYearEleven
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the ninth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryDueInYearNine
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the seventh fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryDueInYearSeven
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the sixth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	sybt_FederalHomeLoanBankAdvancesMaturitiesSummaryDueInYearSix
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Name:	us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresInterestRateAtPeriodEnd
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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due within one year of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13)(3)(a))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from one to two years of the Balance Sheet date.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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-Subparagraph (SX 210.9-03.13(3)(a))
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Name:	us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate
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The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from two to three years of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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-Paragraph 1
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Name:	us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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Name:	us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Name:	us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Name:	us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate
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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
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-Publisher FASB
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