Fair Value Measurements (Estimated Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets, Estimated Fair Value
Investment securities held to maturity	$ 9,715	$ 6,000
Fair Value, Inputs, Level 1 [Member] \| Carrying Amount [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	103,373	67,225
Fair Value, Inputs, Level 1 [Member] \| Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	103,373	67,225
Fair Value, Inputs, Level 2 [Member] \| Carrying Amount [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	9,780	6,043
Restricted securities	4,655	6,476
Cash surrender value on life insurance	18,440	3,726
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	362,557	330,466
Checking plus interest	288,521	239,809
Money market	248,114	232,613
Savings	141,498	148,723
Club	1,502	387
Brokered Deposits	12,070	22,084
Certificates of deposit, $100,000 or more	123,142	97,905
Other time	148,087	140,354
Short-term borrowings	17,263	60,812
Long-term borrowings	15,000	15,000
Fair Value, Inputs, Level 2 [Member] \| Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	9,715	6,000
Restricted securities	4,655	6,476
Cash surrender value on life insurance	18,440	3,726
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	362,557	330,466
Checking plus interest	288,521	239,809
Money market	248,114	232,613
Savings	141,498	148,723
Club	1,502	387
Brokered Deposits	12,067	22,075
Certificates of deposit, $100,000 or more	123,655	96,435
Other time	147,684	136,292
Short-term borrowings	17,263	60,812
Long-term borrowings	14,999	15,012
Fair Value, Inputs, Level 3 [Member] \| Carrying Amount [Member]
Financial assets, Estimated Fair Value
Loans, net	1,224,597	1,185,012
Fair Value, Inputs, Level 3 [Member] \| Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Loans, net	$ 1,227,196	$ 1,150,418

Bank Owned Life Insurance, Fair Value Disclosure

No definition available.

Name:	shbi_BankOwnedLifeInsuranceFairValueDisclosure
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Brokered Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Certificates Of Deposit Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Checking Plus Interest, Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Club Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Money Market, Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Noninterest Bearing Demand, Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Other Time Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Restricted Securities, Fair Value Disclosure

+ References

No definition available.

+ Details

Name:	shbi_RestrictedSecuritiesFairValueDisclosure
Namespace Prefix:	shbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Savings, Deposits, Fair Value Disclosure

+ References

No definition available.

+ Details

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

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

+ Details

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

- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

+ Details

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

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Details

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