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LOANS - Composition of loans receivable and loans held-for-sale (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Business Activites Loans    
Residential 1-4 family $ 258,642us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 $ 252,258us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Residential 5+ multifamily 5,792us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 5,556us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Construction of residential 1-4 family 3,681us-gaap_LoansAndLeasesReceivableConsumerConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 2,004us-gaap_LoansAndLeasesReceivableConsumerConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Home equity credit 34,414us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 34,627us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Residential real estate 302,529us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 294,445us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Commercial 102,194us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 98,498us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Construction of commercial 14,814us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 18,602us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Commercial real estate 117,008us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 117,100us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Farm land 3,207us-gaap_LoansReceivableCommercialAgricultural
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 3,239us-gaap_LoansReceivableCommercialAgricultural
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Vacant land 9,268us-gaap_LoansReceivableCommercialDevelopment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 9,342us-gaap_LoansReceivableCommercialDevelopment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Real estate secured 432,012us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 424,126us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Commercial and industrial 55,923us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 49,204us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Municipal 6,109us-gaap_LoansAndLeasesReceivableCommercialGovernments
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 6,083us-gaap_LoansAndLeasesReceivableCommercialGovernments
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Consumer 4,598us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 4,334us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Loans receivable, gross 498,642us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 483,747us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Deferred loan origination fees and costs, net 1,206us-gaap_DeferredFinanceCostsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 1,203us-gaap_DeferredFinanceCostsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Allowance for loan losses (5,119)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 (5,337)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Loans receivable, net 494,729us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 479,613us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Loans held-for-sale    
Residential 1-4 family 328us-gaap_InventoryRealEstateMortgageLoansHeldInInventory
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember		 568us-gaap_InventoryRealEstateMortgageLoansHeldInInventory
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableBusinessActivitiesMember
Acquired Loans    
Residential 1-4 family 9,513us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 9,223us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Residential 5+ multifamily 6,406us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 8,735us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Construction of residential 1-4 family      
Home equity credit      
Residential real estate 15,919us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 17,958us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Commercial 94,846us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 97,899us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Construction of commercial 9,913us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 9,045us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Commercial real estate 104,759us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 106,944us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Farm land      
Vacant land      
Real estate secured 120,678us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 124,902us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Commercial and industrial 61,280us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 68,714us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Municipal      
Consumer 110us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 122us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Loans receivable, gross 182,068us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 193,738us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Deferred loan origination fees and costs, net      
Allowance for loan losses (63)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 (21)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Loans receivable, net 182,005us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember		 193,717us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= SAL_LoansReceivableAcquiredMember
Loans held-for-sale    
Residential 1-4 family      
Total    
Residential 1-4 family 268,155us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 261,481us-gaap_LoansAndLeasesReceivableConsumer
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Residential 5+ multifamily 12,198us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 14,291us-gaap_LoansAndLeasesReceivableConsumerOther
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Construction of residential 1-4 family 3,681us-gaap_LoansAndLeasesReceivableConsumerConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 2,004us-gaap_LoansAndLeasesReceivableConsumerConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Home equity credit 34,414us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 34,627us-gaap_LoansAndLeasesReceivableConsumerHomeEquity
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Residential real estate 318,448us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 312,403us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Commercial 197,040us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 196,397us-gaap_LoansAndLeasesReceivableCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Construction of commercial 24,727us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 27,647us-gaap_LoansReceivableCommercialConstruction
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Commercial real estate 221,767us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 224,044us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Farm land 3,207us-gaap_LoansReceivableCommercialAgricultural
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 3,239us-gaap_LoansReceivableCommercialAgricultural
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Vacant land 9,268us-gaap_LoansReceivableCommercialDevelopment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 9,342us-gaap_LoansReceivableCommercialDevelopment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Real estate secured 552,690us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 549,028us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Commercial and industrial 117,203us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 117,918us-gaap_LoansReceivableCommercialAndIndustrial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Municipal 6,109us-gaap_LoansAndLeasesReceivableCommercialGovernments
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 6,083us-gaap_LoansAndLeasesReceivableCommercialGovernments
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Consumer 4,708us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 4,456us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Loans receivable, gross 680,710us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 677,485us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Deferred loan origination fees and costs, net 1,206us-gaap_DeferredFinanceCostsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 1,203us-gaap_DeferredFinanceCostsNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Allowance for loan losses (5,182)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 (5,358)us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Loans receivable, net 676,734us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 673,330us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember
Loans held-for-sale    
Residential 1-4 family $ 328us-gaap_InventoryRealEstateMortgageLoansHeldInInventory
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember		 $ 568us-gaap_InventoryRealEstateMortgageLoansHeldInInventory
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansReceivableMember