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Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Impaired loans: |  |
Beginning balance | $ 86,626 | $ 75,112
Charge-offs | (31,062) | (16,034)
Payments | (11,923) | (11,348)
Transferred to loans held for sale | (22,107) | 0
Transferred to other real estate owned | (2,535) | (4,458)
Returned to performing status | (3,523) | (240)
Changed to nonaccrual status | (3,367) | (1,452)
Additions | 33,750 | 47,181
Changes in allowance | 34 | 1,447
Ending balance | 45,893 | 90,208
Construction [Member] |  |
Impaired loans: |  |
Beginning balance | 36,088 | 27,166
Charge-offs | (19,377) | (4,965)
Payments | (1,510) | (976)
Transferred to loans held for sale | (9,820) | 0
Transferred to other real estate owned | (205) | (1,631)
Returned to performing status | 0 | 0
Changed to nonaccrual status | 0 | (666)
Additions | 3,821 | 20,856
Changes in allowance | 519 | 151
Ending balance | 9,516 | 39,935
Residential Real Estate [Member] |  |
Impaired loans: |  |
Beginning balance | 17,951 | 22,602
Charge-offs | (4,664) | (7,628)
Payments | (2,183) | (8,405)
Transferred to loans held for sale | (5,492) | 0
Transferred to other real estate owned | (729) | (1,463)
Returned to performing status | (2,448) | (201)
Changed to nonaccrual status | (1,626) | (786)
Additions | 20,764 | 14,256
Changes in allowance | (326) | 1,296
Ending balance | 21,247 | 19,671
Commercial Real Estate [Member] |  |
Impaired loans: |  |
Beginning balance | 31,833 | 23,578
Charge-offs | (6,893) | (2,177)
Payments | (8,170) | (1,858)
Transferred to loans held for sale | (6,795) | 0
Transferred to other real estate owned | (1,601) | (1,334)
Returned to performing status | (1,075) | 0
Changed to nonaccrual status | (1,741) | 0
Additions | 8,747 | 10,693
Changes in allowance | 159 | 0
Ending balance | 14,464 | 28,902
Commercial [Member] |  |
Impaired loans: |  |
Beginning balance | 715 | 1,738
Charge-offs | (90) | (1,264)
Payments | (47) | (105)
Transferred to loans held for sale | 0 | 0
Transferred to other real estate owned | 0 | (30)
Returned to performing status | 0 | (39)
Changed to nonaccrual status | 0 | 0
Additions | 374 | 1,346
Changes in allowance | (305) | 0
Ending balance | 647 | 1,646
Consumer [Member] |  |
Impaired loans: |  |
Beginning balance | 39 | 28
Charge-offs | (38) | 0
Payments | (13) | (4)
Transferred to loans held for sale | 0 | 0
Transferred to other real estate owned | 0 | 0
Returned to performing status | 0 | 0
Changed to nonaccrual status | 0 | 0
Additions | 44 | 30
Changes in allowance | (13) | 0
Ending balance | $ 19 | $ 54

X
- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is non required for reconciliation purposes of beginning balances. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetBeginningValue
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The Fair Value, Measurement with Unobservable Inputs Reconciliation, Non Recurring Basis, Asset Changed to Nonaccrual Status level 3 during the period. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetChangedNonaccrualStatus
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Writing off impaired financing receivables (Level 3) deemed uncollectible. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetChangeOff
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The Fair Value, Measurement with Unobservable Inputs Reconciliation, Non recurring Basis, changes in allowance for Asset (Level 3). + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonrecurringBasisAssetChangesAllowances
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is non required for reconciliation purposes of ending balances. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetEndingValue
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetPayments
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) of assets measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period. Such increase (decrease) may be comprised of changes in fair value (gains or losses) whether realized or unrealized that have been included in earnings, changed net asset value, or other comprehensive income (a separate component of shareholders' equity); purchases, sales, issuances, or settlements of assets; and net transfers in to or out of this category within the fair value hierarchy. + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonrecurringBasisAssetPeriodIncreaseDecrease
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The Fair Value, Measurement with Unobservable Inputs Reconciliation, Non Recurring Basis, Asset Returned To Performing Status (Level 3). + References No definition available. + Details
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetReturnToPerformingStatus
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Transfers into assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period. + References No definition available. + Details
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Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Value of loans transferred to loans held for sale. + References No definition available. + Details
Name: | shbi_TransferToLoansHeldForSale
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LoanAndLeaseReceivablesImpairedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration