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

Reflects the carrying amount of loans deemed to be questionable as to collection on which interest is continuing to be earned or accrued.

No definition available.

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

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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

Amount before allowance of other loans and leases not otherwise specified in the taxonomy. 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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

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. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesCollectivelyEvaluatedLoansCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesRealEstateCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesIndividuallyEvaluatedLoansCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesTotalPortfolioLoansCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoansAndLeasesReceivableCreditQualitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesCollectivelyEvaluatedLoansCreditQualitySegmentAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesRealEstateCreditQualitySegmentAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesIndividuallyEvaluatedLoansCreditQualitySegmentAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesCreditQualitySegmentAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=SAL_AllowanceForLoanAndLeaseLossesTotalPortfolioLoansCreditQualitySegmentAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: