No definition available.

Name:	SAL_USTreasurySecuritiesAtCarryingValue
Namespace Prefix:	SAL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI https://asc.fasb.org/extlink&oid=126982154&loc=d3e400-110220

+ Details

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

- Definition

Amount of securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.

+ References

No definition available.

+ Details

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

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

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

- Definition

The total of collateralized agreements including securities purchased under agreements to resell (repos), borrowed securities, and secured demand notes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 10
-Section 05
-Paragraph 16
-URI https://asc.fasb.org/extlink&oid=109246787&loc=d3e93640-111703

+ Details

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

- Definition

Sum as of the balance sheet date of the (a) fair values of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the liabilities arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

No definition available.

+ Details

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

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

+ References

No definition available.

+ Details

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

- Definition

Bonds or similar securities issued by state, city, or local governments or the agencies operated by state, city, or local governments which are 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. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

No definition available.

+ Details

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

- Definition

Debt securities issued by a United States government agency such as Government National Mortgage Association (Ginnie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae), which are 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. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	SAL_FairValueByFairValueHierarchyLevelSALAxis=SAL_FairValueInputsLevel1SALMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	SAL_FairValueByFairValueHierarchyLevelSALAxis=SAL_FairValueInputsLevel2SALMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	SAL_FairValueByFairValueHierarchyLevelSALAxis=SAL_FairValueInputsLevel3SALMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	SAL_FairValueByFairValueHierarchyLevelSALAxis=SAL_FairValueInputsLevel12And3SALMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Assets measured at fair value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member]
Assets at fair value on a recurring basis
U.S. Treasury
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
Mutual funds		901
Derivative financial instruments
Assets at fair value on a non-recurring basis
Assets held for sale 1		700
Fair Value, Inputs, Level 2 [Member]
Assets at fair value on a recurring basis
U.S. Treasury		15,131
U.S. Government Agency notes		31,604
Municipal bonds		47,822
U.S. Government agencies and U.S. Government-sponsored enterprises		74,541
U.S. Government agencies		20,898
Corporate bonds		12,400
Securities available-for-sale		202,396
Mutual funds
Derivative financial instruments		18
Assets at fair value on a non-recurring basis
Assets held for sale 1
Fair Value, Inputs, Level 3 [Member]
Assets at fair value on a recurring basis
U.S. Treasury
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
Mutual funds
Derivative financial instruments
Assets at fair value on a non-recurring basis
Assets held for sale 1
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]
Assets at fair value on a recurring basis
U.S. Treasury		15,131
U.S. Government Agency notes		31,604
Municipal bonds		47,822
U.S. Government agencies and U.S. Government-sponsored enterprises		74,541
U.S. Government agencies		20,898
Corporate bonds		12,400
Securities available-for-sale		202,396
Mutual funds		901
Derivative financial instruments		18
Assets at fair value on a non-recurring basis
Assets held for sale 1		$ 700
Fair Value Inputs Level 1 S A L [Member]
Assets at fair value on a recurring basis
U.S. Treasury
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds	833
Securities available-for-sale	833
Mutual funds	1,933
Fair Value Inputs Level 2 S A L [Member]
Assets at fair value on a recurring basis
U.S. Treasury	17,133
U.S. Government Agency notes	27,154
Municipal bonds	46,538
U.S. Government agencies and U.S. Government-sponsored enterprises	61,875
U.S. Government agencies	21,936
Corporate bonds	11,941
Securities available-for-sale	186,577
Mutual funds
Fair Value Inputs Level 3 S A L [Member]
Assets at fair value on a recurring basis
U.S. Treasury
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
Mutual funds
Fair Value Inputs Level 12 And 3 S A L [Member]
Assets at fair value on a recurring basis
U.S. Treasury	17,133
U.S. Government Agency notes	27,154
Municipal bonds	46,538
U.S. Government agencies and U.S. Government-sponsored enterprises	61,875
U.S. Government agencies	21,936
Corporate bonds	12,744
Securities available-for-sale	187,410
Mutual funds	$ 1,933