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Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Impaired loans: |  |
Beginning balance | $ 75,112 | $ 61,186
Charge-offs | (9,830) | (9,952)
Payments | (5,358) | (8,640)
Transfers to other real estate owned | (3,747) | (5,002)
Returned to performing status | 0 | (1,907)
Changed to nonaccrual status | (1,452) | (4,381)
Additions | 28,998 | 39,628
Changes in allowance | 436 | (1,159)
Ending balance | 84,159 | 69,773
Construction [Member] |  |
Impaired loans: |  |
Beginning balance | 27,166 | 28,175
Charge-offs | (1,775) | (1,396)
Payments | (715) | (837)
Transfers to other real estate owned | (1,620) | (1,719)
Returned to performing status | 0 | 0
Changed to nonaccrual status | (666) | (419)
Additions | 8,776 | 4,403
Changes in allowance | 90 | 0
Ending balance | 31,256 | 28,207
Residential Real Estate [Member] |  |
Impaired loans: |  |
Beginning balance | 22,602 | 15,327
Charge-offs | (5,356) | (4,300)
Payments | (3,185) | (4,931)
Transfers to other real estate owned | (763) | (522)
Returned to performing status | 0 | (1,907)
Changed to nonaccrual status | (786) | (2,162)
Additions | 11,600 | 18,391
Changes in allowance | 876 | (86)
Ending balance | 24,988 | 19,810
Commercial Real Estate [Member] |  |
Impaired loans: |  |
Beginning balance | 23,578 | 13,280
Charge-offs | (1,435) | (2,487)
Payments | (1,375) | (2,329)
Transfers to other real estate owned | (1,334) | (2,577)
Returned to performing status | 0 | 0
Changed to nonaccrual status | 0 | (1,800)
Additions | 7,279 | 15,723
Changes in allowance | (500) | (506)
Ending balance | 26,213 | 19,304
Commercial [Member] |  |
Impaired loans: |  |
Beginning balance | 1,738 | 4,374
Charge-offs | (1,264) | (1,769)
Payments | (80) | (542)
Transfers to other real estate owned | (30) | (184)
Returned to performing status | 0 | 0
Changed to nonaccrual status | 0 | 0
Additions | 1,313 | 1,111
Changes in allowance | (30) | (567)
Ending balance | 1,647 | 2,423
Consumer [Member] |  |
Impaired loans: |  |
Beginning balance | 28 | 30
Charge-offs | 0 | 0
Payments | (3) | (1)
Transfers to other real estate owned | 0 | 0
Returned to performing status | 0 | 0
Changed to nonaccrual status | 0 | 0
Additions | 30 | 0
Changes in allowance | 0 | 0
Ending balance | $ 55 | $ 29

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
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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, NonRecurring Basis, changes in allowance for Asset (Level 3). + References No definition available. + Details
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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
Period Type: | instant

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
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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
Name: | shbi_FairValueMeasurementWithUnobservableInputsReconciliationNonRecurringBasisAssetTransfersIntoLevel3
Namespace Prefix: | shbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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