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Stock Based Compensation, Additional Information (Details) (USD $)
12 Months Ended
Dec. 31, 2014
CompensationPlan
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of share based compensation plans 2sryb_StockBasedCompensationNumberOfShareBasedCompensationPlans  
Compensation cost that has been charged against income $ 0us-gaap_AllocatedShareBasedCompensationExpense $ 0us-gaap_AllocatedShareBasedCompensationExpense
Expected average life of stock option 10 years  
Weighted average remaining life of vested options expected to vest 5 years  
Total unrecognized compensation cost related 0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized  
Intrinsic value of option exercisable $ 48,368us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1  
Qualified Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of exercisable option granted per year under vest plan (in hundredths) 20.00%sryb_ShareBasedCompensationOptionsGrantedVestingPercentage
/ us-gaap_PlanNameAxis
= sryb_QualifiedStockOptionPlanMember
 
Stock option plan expiration, maximum period 10 years  
Non-Qualified Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option plan expiration, maximum period 10 years  
Non-qualified stock option granted exercisable period 6 months