Loans and Allowance for Credit Losses (Loans by Class of Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,264,579	$ 2,119,175
Allowance for credit losses	(15,483)	(13,944)
Loans, net	2,249,096	2,105,231
Outstanding principal balance	46,833
Acquired loans - PCI	29,295	33,650
PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	29,295	33,650
Severn Bancorp, Inc.
Loans and Leases Receivable Disclosure [Line Items]
Outstanding principal balance	459,133	561,417
Acquired loans - PCI	451,532	552,993
Severn Bancorp, Inc. \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Outstanding principal balance	32,398	36,943
Acquired loans - PCI	29,295	33,650
Severn Bancorp, Inc. \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Outstanding principal balance	426,735	524,474
Acquired loans - PCI	422,237	519,343
Commercial and Residential Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	263,069	239,353
Allowance for credit losses	(3,345)	(2,454)
Acquired loans - PCI	681	2,379
Commercial and Residential Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	681	2,379
Commercial and Residential Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	54,545	94,202
Commercial and Residential Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Construction Loans [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	681	2,379
Commercial and Residential Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Construction Loans [Member] \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	53,864	91,823
Residential Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	695,421	654,769
Allowance for credit losses	(2,778)	(2,858)
Acquired loans - PCI	15,492	17,326
Residential Portfolio Segment [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	15,492	17,326
Residential Portfolio Segment [Member] \| Severn Bancorp, Inc.
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	153,796	184,906
Residential Portfolio Segment [Member] \| Severn Bancorp, Inc. \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	15,492	17,326
Residential Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	138,304	167,580
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	953,090	896,229
Allowance for credit losses	(4,441)	(4,598)
Acquired loans - PCI	12,860	13,594
Commercial Real Estate Portfolio Segment [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	12,860	13,594
Commercial Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc.
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	200,711	216,413
Commercial Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc. \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	12,860	13,594
Commercial Real Estate Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	187,851	202,819
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	158,345	203,377
Allowance for credit losses	(1,681)	(2,070)
Acquired loans - PCI	239	321
Commercial Portfolio Segment [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	239	321
Commercial Portfolio Segment [Member] \| Severn Bancorp, Inc.
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	41,690	56,521
Commercial Portfolio Segment [Member] \| Severn Bancorp, Inc. \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	239	321
Commercial Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	41,451	56,200
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	194,654	125,447
Allowance for credit losses	(3,238)	(1,964)
Acquired loans - PCI	23	30
Consumer Portfolio Segment [Member] \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	23	30
Consumer Portfolio Segment [Member] \| Severn Bancorp, Inc.
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	790	951
Consumer Portfolio Segment [Member] \| Severn Bancorp, Inc. \| PCI loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	23	30
Consumer Portfolio Segment [Member] \| Severn Bancorp, Inc. \| Performing loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans - PCI	$ 767	$ 921

Amount of contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538

+ Details

Name:	us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538

+ Details

Name:	us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=shbi_SevernBancorpInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredAndNoCreditDeteriorationMember
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:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
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_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: