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Employee Benefit Plans (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]    
Cash value of life insurance policies $ 5,623,087us-gaap_CashSurrenderValueOfLifeInsurance $ 5,462,336us-gaap_CashSurrenderValueOfLifeInsurance
Additional life insurance policies purchased by bank 419,150sryb_IncreaseInBankOwnedLifeInsurance  
Directors [Member]    
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]    
Additional employer matching contribution percentage (in hundredths) 30.00%sryb_DeferredCompensationPlanAdditionalEmployerMatchingContributionPercentOfMatch
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Defined contribution plan payout period 10 years  
Accrued liability for deferred director fees 968,398sryb_LiabilityAccruedForDeferredDirectorsFees
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
851,751sryb_LiabilityAccruedForDeferredDirectorsFees
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
Deferred director fees 131,310sryb_DeferredDirectorsFeesExpensed
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
141,166sryb_DeferredDirectorsFeesExpensed
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
Benefits paid 14,663sryb_DeferredCompensationArrangementWithIndividualBenefitsPaid
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
14,814sryb_DeferredCompensationArrangementWithIndividualBenefitsPaid
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
SERP [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Beginning age of executive for the plan 65sryb_EmployeeBenefitPlansMinimumAgeForProjectedPayment
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
 
Accrued compensation liability 908,484us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
783,041us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Employee benefit expense 145,279us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
133,229us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Defined benefits paid 19,836us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
19,836us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Discount rate for the plan 5.25%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
5.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
SERP [Member] | Minimum [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Future compensation payments 50,827us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
SERP [Member] | Maximum [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Future compensation payments 89,914us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Defined Contribution Plan [Member]    
Defined Contribution Plan Disclosure [Line Items]    
Employee contribution 6.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
/ sryb_DefinedContributionPlanTypeAxis
= us-gaap_PensionPlansDefinedBenefitMember
 
Employer contribution to plan amount $ 154,958us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
/ sryb_DefinedContributionPlanTypeAxis
= us-gaap_PensionPlansDefinedBenefitMember
$ 150,093us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
/ sryb_DefinedContributionPlanTypeAxis
= us-gaap_PensionPlansDefinedBenefitMember