Loans and Allowance for Credit Losses (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Allowance for credit losses:
Beginning balance	$ 9,787	$ 8,927	$ 9,781	$ 8,726
Charge-offs	(181)	(846)	(708)	(1,163)
Recoveries	97	77	141	168
Net charge-offs	(84)	(769)	(567)	(995)
Provision	418	974	907	1,401
Ending balance	10,121	9,132	10,121	9,132
Commercial and Residential Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Allowance for credit losses:
Beginning balance	2,541	2,290	2,460	2,787
Charge-offs		(25)	(379)	(54)
Recoveries	6	9	15	16
Net charge-offs	6	(16)	(364)	(38)
Provision	46	75	497	(400)
Ending balance	2,593	2,349	2,593	2,349
Residential Portfolio Segment [Member]
Allowance for credit losses:
Beginning balance	2,359	2,131	2,284	1,953
Charge-offs	(41)	(100)	(179)	(323)
Recoveries	73	10	86	21
Net charge-offs	32	(90)	(93)	(302)
Provision	(241)	55	(41)	445
Ending balance	2,150	2,096	2,150	2,096
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit losses:
Beginning balance	2,643	2,912	2,594	2,610
Recoveries	8	8	18	19
Net charge-offs	8	8	18	19
Provision	194	(118)	233	173
Ending balance	2,845	2,802	2,845	2,802
Commercial Portfolio Segment [Member]
Allowance for credit losses:
Beginning balance	2,027	1,338	2,241	1,145
Charge-offs	(126)	(706)	(126)	(771)
Recoveries	10	42	22	100
Net charge-offs	(116)	(664)	(104)	(671)
Provision	299	978	73	1,178
Ending balance	2,210	1,652	2,210	1,652
Consumer Portfolio Segment [Member]
Allowance for credit losses:
Beginning balance	217	256	202	231
Charge-offs	(14)	(15)	(24)	(15)
Recoveries		8		12
Net charge-offs	(14)	(7)	(24)	(3)
Provision	120	(16)	145	5
Ending balance	$ 323	$ 233	$ 323	$ 233

No definition available.

Name:	shbi_LoansandleasesreceivableallowancesabstractAbstract
Namespace Prefix:	shbi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

+ Details

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

- Definition

The increase (decrease) in the allowance for credit losses related to financing receivables.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

+ Details

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

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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

- 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: