SECURITIES - Aggreggate fair value and gross unrealized loss of securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Less Than 12 Months, Fair value
Available-for-sale
Municipal bonds	$ 1,303
Mortgage-backed securities	239
Collateralized mortgage obligations, Non-agency	291
Total temporarily impaired securities	1,833
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities	1,833
Less Than 12 Months, Unrealized losses
Available-for-sale
Municipal bonds	(29)
Mortgage-backed securities	(2)
Collateralized mortgage obligations, Non-agency	(7)
Total temporarily impaired securities	(38)
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities	(38)
12 Months or Longer, Fair value
Available-for-sale
Municipal bonds
Mortgage-backed securities
Collateralized mortgage obligations, Non-agency
Total temporarily impaired securities
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities
12 Months or Longer, Unrealized losses
Available-for-sale
Municipal bonds
Mortgage-backed securities
Collateralized mortgage obligations, Non-agency
Total temporarily impaired securities
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities
Total, Fair value
Available-for-sale
Municipal bonds	1,303
Mortgage-backed securities	239
Collateralized mortgage obligations, Non-agency	291
Total temporarily impaired securities	1,833
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities	1,833
Total, Unrealized losses
Available-for-sale
Municipal bonds	(29)
Mortgage-backed securities	(2)
Collateralized mortgage obligations, Non-agency	(7)
Total temporarily impaired securities	(38)
Other-than-temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily and other-than-temporarily impaired securities	$ (38)

Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 14A

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (aaa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

+ Details

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

- Definition

Total of accumulated other comprehensive loss related to that portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized either as available-for-sale or held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

+ References

+ Details

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

- Details

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

- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818

+ Details

Name:	us-gaap_DepositLiabilitiesCollateralIssuedFinancialInstruments
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

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Mortgage-Backed Securities

-URI http://asc.fasb.org/extlink&oid=6517959

+ 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

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

- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563

+ Details

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

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecurities12MonthsOrLongerFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecurities12MonthsOrLongerUnrealizedLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecuritiesLessThan12MonthsFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecuritiesLessThan12MonthsUnrealizedLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecuritiesTotalFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtSecurityAxis=SAL_AggregateFairValueGrossUnrealizedLossOfSecuritiesTotalUnrealizedLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: