Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	$ 9,193	$ 11,781
New TDRs	1,506	41
Disbursements (Payments)	(633)	(2,154)
Charge offs		(3)
Payoffs	(1,425)	(353)
TDR ending balance	8,641	9,312
TDR, Related Allowance	156	344
Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	1,692	3,118
New TDRs	1,506
Disbursements (Payments)	(482)	(1,391)
Charge offs		(3)
Payoffs	(1,342)
TDR ending balance	1,374	1,724
TDR, Related Allowance		137
Impaired Nonaccrual Loans [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	1,393
Disbursements (Payments)	(51)
Payoffs	(1,342)
Impaired Nonaccrual Loans [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
New TDRs	1,506
Disbursements (Payments)	(401)
TDR ending balance	1,105
Impaired Nonaccrual Loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	299	320
Disbursements (Payments)	(30)	(12)
TDR ending balance	269	308
TDR, Related Allowance		4
Impaired Nonaccrual Loans [Member] \| Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance		2,798
Disbursements (Payments)		(1,379)
Charge offs		(3)
TDR ending balance		1,416
TDR, Related Allowance		133
Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	7,501	8,663
New TDRs		41
Disbursements (Payments)	(151)	(763)
Payoffs	(83)	(353)
TDR ending balance	7,267	7,588
TDR, Related Allowance	156	207
Impaired Accruing Restructured Loans [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	4,041	4,454
New TDRs		41
Disbursements (Payments)	(80)	(73)
Payoffs	(83)	(353)
TDR ending balance	3,878	4,069
TDR, Related Allowance	142	185
Impaired Accruing Restructured Loans [Member] \| Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	3,419	4,158
Disbursements (Payments)	(66)	(682)
TDR ending balance	3,353	3,476
TDR, Related Allowance	14	22
Impaired Accruing Restructured Loans [Member] \| Construction Loans [Member] \| Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	41	51
Disbursements (Payments)	(5)	(8)
TDR ending balance	$ 36	$ 43

Financing receivables, impaired, troubled debt restructuring, balance.

No definition available.

Name:	shbi_FinancingReceivablesImpairedTroubledDebtRestructuringBalance
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing receivables, impaired, troubled debt restructuring, disbursements (payments received).

+ References

No definition available.

+ Details

Name:	shbi_FinancingReceivablesImpairedTroubledDebtRestructuringDisbursementsPayments
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Financing receivables, impaired, troubled debt restructuring, new.

+ References

No definition available.

+ Details

Name:	shbi_FinancingReceivablesImpairedTroubledDebtRestructuringNew
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Financing receivables, impaired, troubled debt restructuring, payoffs.

+ References

No definition available.

+ Details

Name:	shbi_FinancingReceivablesImpairedTroubledDebtRestructuringPayoffs
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Financing receivables, impaired, troubled debt restructuring related allowance.

+ References

No definition available.

+ Details

Name:	shbi_FinancingReceivablesImpairedTroubledDebtRestructuringRelatedAllowance
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

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

- Details

Name:	shbi_ImpairedNonaccrualLoansAxis=shbi_ImpairedNonaccrualLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
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:

- Details

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

- Details

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

- Details

Name:	shbi_ImpairedNonaccrualLoansAxis=shbi_ImpairedAccruingRestructuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: