Number of loans renewed while interest was not paid current.

No definition available.

Name:	sryb_FinancingReceivableModificationsNumberOfLoansRenewedWhileInterestWasNotPaidCurrent
Namespace Prefix:	sryb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sryb_CommercialRealEstateConstructionAndDevelopmentFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sryb_RealEstateResidentialOneToFourFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sryb_RealEstateNonFarmlandAndNonResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

TROUBLED DEBT RESTRUCTURINGS (Details)	3 Months Ended		6 Months Ended
TROUBLED DEBT RESTRUCTURINGS (Details)	Jun. 30, 2016 USD ($) Loan	Jun. 30, 2015 Loan	Jun. 30, 2016 USD ($) Loan	Jun. 30, 2015 Loan
Financing Receivable, Modifications [Line Items]
Number of contracts \| Loan	3	0		0
Number of defaulted loans that had previously been restructured \| Loan	0	0
Number of loans renewed while interest was not paid current \| Loan	1
Real Estate [Member] \| Construction & Development [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts \| Loan	0		0
Pre-modification outstanding recorded investment	$ 0		$ 0
Post-modification outstanding recorded investment	$ 0		$ 0
Real Estate [Member] \| 1-4 Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts \| Loan	1		1
Pre-modification outstanding recorded investment	$ 137,472		$ 137,472
Post-modification outstanding recorded investment	$ 137,472		$ 137,472
Real Estate [Member] \| Nonfarm, Nonresidential [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts \| Loan	0		0
Pre-modification outstanding recorded investment	$ 0		$ 0
Post-modification outstanding recorded investment	$ 0		$ 0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts \| Loan	2		2
Pre-modification outstanding recorded investment	$ 41,435		$ 41,435
Post-modification outstanding recorded investment	$ 41,435		$ 41,435