LOANS - Certain data with respect to loans individually evaluated for impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Business Activities Loans - Impaired loans with specific allowance - Loan balance - Book
Residential 1-4 family	$ 6,141	$ 5,008
Home equity credit	390	9
Residential real estate	6,531	5,017
Commercial	$ 1,607	$ 3,383
Commercial construction
Farm land	$ 736
Vacant land	3,052	$ 3,097
Real estate secured	11,926	11,497
Commercial and industrial	$ 69	$ 102
Consumer
Totals	$ 11,995	$ 11,599
Business Activities Loans - Impaired loans with specific allowance - Loan balance - Note
Residential 1-4 family	6,634	5,157
Home equity credit	412	24
Residential real estate	7,046	5,181
Commercial	$ 1,760	$ 3,563
Commercial construction
Farm land	$ 736
Vacant land	3,944	$ 3,996
Real estate secured	13,486	12,740
Commercial and industrial	$ 112	$ 161
Consumer
Totals	$ 13,598	$ 12,901
Business Activities Loans - Impaired loans with specific allowance - Loan balance - Average
Residential 1-4 family	5,750	4,547
Home equity credit	63	91
Residential real estate	5,813	4,638
Commercial	$ 2,469	$ 3,262
Commercial construction
Farm land	$ 423
Vacant land	3,088	$ 3,090
Real estate secured	11,793	10,990
Commercial and industrial	$ 82	$ 106
Consumer
Totals	$ 11,875	$ 11,096
Business Activities Loans - Impaired loans with specific allowance - Specific allowance
Residential 1-4 family	680	552
Home equity credit	37	9
Residential real estate	717	561
Commercial	$ 96	$ 486
Commercial construction
Farm land	$ 73
Vacant land	60	$ 38
Real estate secured	946	1,085
Commercial and industrial	$ 27	$ 51
Consumer
Totals	$ 973	$ 1,136
Business Activities Loans - Impaired loans with specific allowance - Income recognized
Residential 1-4 family	69	$ 128
Home equity credit	5
Residential real estate	74	$ 128
Commercial	$ 21	$ 108
Commercial construction
Farm land	$ 16
Vacant land	6	$ 12
Real estate secured	117	248
Commercial and industrial	$ 2	$ 2
Consumer
Totals	$ 119	$ 250
Business Activities Loans - Impaired loans with no specific allowance - Loan balance - Book
Residential 1-4 family	3,820	2,273
Home equity credit	324	387
Residential real estate	4,144	2,660
Commercial	2,710	1,331
Commercial construction	125	128
Farm land	370	$ 384
Vacant land	36
Real estate secured	7,385	$ 4,503
Commercial and industrial	$ 441	$ 467
Consumer
Totals	$ 7,826	$ 4,970
Business Activities Loans - Impaired loans with no specific allowance - Loan balance - Note
Residential 1-4 family	4,110	2,395
Home equity credit	345	405
Residential real estate	4,455	2,800
Commercial	3,002	1,520
Commercial construction	131	134
Farm land	370	$ 384
Vacant land	44
Real estate secured	8,002	$ 4,838
Commercial and industrial	$ 471	469
Consumer		19
Totals	$ 8,473	5,307
Business Activities Loans - Impaired loans with no specific allowance - Loan balance - Average
Residential 1-4 family	3,043	2,703
Home equity credit	611	441
Residential real estate	3,654	3,144
Commercial	2,130	1,468
Commercial construction	127	123
Farm land	270	$ 384
Vacant land	5
Real estate secured	6,186	$ 5,119
Commercial and industrial	$ 464	516
Consumer		19
Totals	$ 6,650	5,654
Business Activities Loans - Impaired loans with no specific allowance - Income recognized
Residential 1-4 family	61	57
Home equity credit	1	4
Residential real estate	62	61
Commercial	36	$ 54
Commercial construction	$ 4
Farm land
Vacant land
Real estate secured	$ 102	$ 115
Commercial and industrial	$ 7	$ 30
Consumer
Totals	$ 109	$ 145
Acquired Loans - Impaired loans with specific allowance - Loan balance - Book
Residential 1-4 family	$ 581
Home equity credit
Residential real estate	$ 581
Commercial	$ 1,526
Commercial construction
Farm land
Vacant land
Real estate secured	$ 2,107
Commercial and industrial
Consumer
Totals	$ 2,107
Acquired Loans - Impaired loans with specific allowance - Loan balance - Note
Residential 1-4 family	$ 716
Home equity credit
Residential real estate	$ 716
Commercial	$ 2,173
Commercial construction
Farm land
Vacant land
Real estate secured	$ 2,889
Commercial and industrial
Consumer
Totals	$ 2,889
Acquired Loans - Impaired loans with specific allowance - Loan balance - Average
Residential 1-4 family	$ 83
Home equity credit
Residential real estate	$ 83
Commercial	$ 218
Commercial construction
Farm land
Vacant land
Real estate secured	$ 301
Commercial and industrial
Consumer
Totals	$ 301
Acquired Loans - Impaired loans with specific allowance - Specific allowance
Residential 1-4 family	$ 15
Home equity credit
Residential real estate	$ 15
Commercial	$ 60
Commercial construction
Farm land
Vacant land
Real estate secured	$ 75
Commercial and industrial
Consumer
Totals	$ 75
Acquired Loans - Impaired loans with specific allowance - Income recognized
Residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 24
Commercial construction
Farm land
Vacant land
Real estate secured	$ 24
Commercial and industrial
Consumer
Totals	$ 24
Acquired Loans - Impaired loans with no specific allowance - Loan balance - Book
Residential 1-4 family		$ 562
Home equity credit
Residential real estate		$ 562
Commercial	$ 1,332	$ 2,502
Commercial construction	$ 276
Farm land
Vacant land
Real estate secured	$ 1,608	$ 3,064
Commercial and industrial
Consumer
Totals	$ 1,608	$ 3,064
Acquired Loans - Impaired loans with no specific allowance - Loan balance - Note
Residential 1-4 family		$ 716
Home equity credit
Residential real estate		$ 716
Commercial	$ 1,843	$ 4,014
Commercial construction	$ 278
Farm land
Vacant land
Real estate secured	$ 2,121	$ 4,730
Commercial and industrial		$ 4
Consumer
Totals	$ 2,121	$ 4,734
Acquired Loans - Impaired loans with no specific allowance - Loan balance - Average
Residential 1-4 family	$ 488	$ 562
Home equity credit
Residential real estate	$ 488	$ 562
Commercial	2,334	$ 2,502
Commercial construction	$ 79
Farm land
Vacant land
Real estate secured	$ 2,901	$ 3,064
Commercial and industrial
Consumer
Totals	$ 2,901	$ 3,064
Acquired Loans - Impaired loans with no specific allowance - Income recognized
Residential 1-4 family		$ 3
Home equity credit
Residential real estate		$ 3
Commercial	$ 18	$ 12
Commercial construction
Farm land
Vacant land
Real estate secured	$ 18	$ 15
Commercial and industrial
Consumer
Totals	$ 18	$ 15

Reflects the aggregate value of loans, trade receivables, securities and financial instruments that serve as collateral for obligations arising from a transfer of financial assets recorded as a secured borrowing.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5086-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=55761124&loc=SL6224234-111729

+ Details

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

- Definition

Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. 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.

+ References

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),(b))

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

Reference 2: 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

+ Details

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

- Definition

Amount before allowance of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. 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.

+ References

+ Details

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

- Definition

Amount before allowance of revolving, open-end loan, extended under a line of credit and secured by the borrower's residential property. 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.

+ References

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)(3),(b))

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

+ Details

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

- Definition

Amount before allowance of consumer real estate loans. Includes, but not limited to, construction financing, residential mortgage loans, and home equity lines of credit. 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.

+ References

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)(2),(3),(b))

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

Reference 2: 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

+ Details

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

- Definition

Reflects the aggregate gross carrying amount of all commercial loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on commercial loans and leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

+ Details

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

- Definition

Amount before allowance of loans issued to agricultural institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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)(1))

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

+ Details

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

- Definition

Amount before allowance of loans issued to commercial and industrial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes real estate loans and loans covered under loss sharing agreements.

+ References

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)(1))

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

+ Details

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

- Definition

Amount before allowance of commercial construction loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

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)(2))

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

+ Details

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

- Definition

Amount before allowance of commercial loans to develop land for sale or construction thereon. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

+ Details

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

- Definition

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.

+ References

+ Details

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

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceBookMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_ValuationAllowanceForImpairmentOfRecognizedServicingAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanIncomeRecognizedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceBookMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanIncomeRecognizedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceBookAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceNoteAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanBalanceAverageAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanSpecificAllowanceAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansSpecificAllowanceLoanIncomeRecognizedAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceBookAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceNoteAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanBalanceAverageAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=SAL_ImpairedLoansNoSpecificAllowanceLoanIncomeRecognizedAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: