BASIS OF PRESENTATION (Policies)	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
Impact of New Accounting Pronouncements Issued	Impact of New Accounting Pronouncements Issued In May 2014, August 2015, May 2016, and December 2016, respectively, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, 2015-14, 2016-12, and 2016-20, “Revenue from Contracts with Customers (Topic 606).” The objective of ASU 2014-09 is to clarify principles for recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. Since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other GAAP, the new guidance did not have a material impact on revenue most closely associated with financial instruments, including interest income and expense. The Bank completed its overall assessment of revenue streams and review of related contracts potentially affected by the ASU, including trust and asset management fees, deposit related fees, interchange fees, and merchant income. Salisbury’s revenue recognition policies conformed to Topic 606. As a result, no changes were required to be made to prior period financial statements due to the adoption of this ASU and no changes in revenue recognition were required in the three and nine month periods ending September 30, 2018. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments – overall (subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." This ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments by making targeted improvements to GAAP as follows: (1) require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer; (2) simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value; (3) eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities; (4) eliminate the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (5) require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (7) require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; and (8) clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU 2016-01 is effective for interim and annual reporting periods beginning after December 15, 2017. Salisbury adopted the provisions of this ASU effective January 1, 2018. Adoption of this ASU did not have a material impact on Salisbury’s financial statements. In accordance with (5) above, Salisbury measured the fair value of its loan portfolio as of September 30, 2018 using an exit price notion (see note 10). In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)”. Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee's obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard. All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. They have the option to use certain relief; full retrospective application is prohibited. Salisbury does not expect ASU 2016-02 to have a material impact on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, “Compensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. Some of the key provisions of this new ASU include: (1) companies will no longer record excess tax benefits and certain tax deficiencies in additional paid-in capital (“APIC”). Instead, they will record all excess tax benefits and tax deficiencies as income tax expense or benefit in the income statement, and APIC pools will be eliminated. The guidance also eliminates the requirement that excess tax benefits be realized before companies can recognize them. In addition, the guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity; (2) increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer’s statutory income tax withholding obligation. The new guidance will also require an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on its statement of cash flows (current guidance did not specify how these cash flows should be classified); and (3) permit companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards. Forfeitures can be estimated, as required today, or recognized when they occur. Salisbury has opted to recognize forfeitures as they occur as the impact is not expected to be material. Salisbury adopted ASU 2016-09 as of January 1, 2017. Adoption contributed a $105 thousand benefit to the tax provision in the second quarter 2017 and did not have a material effect on the financial results for the twelve month period ended December 31, 2017. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which adds a new Topic 326 to the Codification and removes the thresholds that companies apply to measure credit losses on financial instruments measured at amortized cost, such as loans, receivables, and held-to-maturity debt securities. Under current U.S. GAAP, companies generally recognize credit losses when it is probable that the loss has been incurred. The revised guidance will remove all recognition thresholds and will require companies to recognize an allowance for credit losses for the difference between the amortized cost basis of a financial instrument and the amount of amortized cost that the company expects to collect over the instrument’s contractual life. ASU 2016-13 also amends the credit loss measurement guidance for available-for-sale debt securities and beneficial interests in securitized financial assets. The guidance in ASU 2016-13 is effective for “public business entities,” as defined, that are SEC filers for fiscal years and for interim periods with those fiscal years beginning after December 15, 2019. Early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Salisbury is currently evaluating the provisions of ASU 2016-13 to determine the potential impact the new standard will have on Salisbury’s Consolidated Financial Statements. In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments." This ASU is intended to reduce diversity in practice in how eight particular transactions are classified in the statement of cash flows. ASU 2016-15 is effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those years. Entities are required to apply the guidance retrospectively. If it is impracticable to apply the guidance retrospectively for an issue, the amendments related to that issue would be applied prospectively. Salisbury adopted ASU 2016-15 on January 1, 2018. ASU 2016-15 did not have a material impact on Salisbury’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business." This ASU is intended to add guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this update provide a screen to determine when a set of inputs, processes, and outputs is not a business. ASU 2017-01 is effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those years. Early adoption is permitted for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance, or for transactions in which a subsidiary is deconsolidated or a group of assets is derecognized that occur before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance. Entities should apply the guidance prospectively on or after the effective date. Salisbury adopted ASU 2017-01 on January 1, 2018. ASU 2017-01 did not impact Salisbury’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” This ASU is intended to allow companies to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The FASB is researching whether similar amendments should be considered for other entities, including public business entities. ASU 2017-04 is effective for public business entities that are SEC filers for fiscal years beginning after December 15, 2019 and interim periods within those years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Entities should apply the guidance prospectively. Salisbury is currently evaluating the provisions of ASU 2017-04 to determine the potential impact the new standard will have on Salisbury’s Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-08, “Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.” This ASU will amend the amortization period for certain purchased callable debt securities held at a premium. The Board is shortening the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. ASU 2017-08 is effective for public business entities for annual periods beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. Entities should apply the guidance on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Salisbury is currently evaluating the provisions of ASU 2017-08 and does not expect that the adoption of the new standard will have a material impact on Salisbury’s Consolidated Financial Statements. In May 2017, the FASB issued ASU 2017-09, “Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting.” This ASU provides clarity in the accounting guidance regarding a change to the terms or conditions of a share-based payment award. ASU 2017-09 is effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Entities should apply the guidance prospectively to an award modified on or after the adoption date. Salisbury adopted ASU 2017-09 on January 1, 2018. ASU 2017-09 did not impact Salisbury’s Consolidated Financial Statements.

BASIS OF PRESENTATION (Policies)

9 Months Ended

Sep. 30, 2018

Impact of New Accounting Pronouncements Issued

Impact of New Accounting Pronouncements Issued

In May 2014, August 2015, May 2016, and December 2016, respectively, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, 2015-14, 2016-12, and 2016-20, “Revenue from Contracts with Customers (Topic 606).” The objective of ASU 2014-09 is to clarify principles for recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. Since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other GAAP, the new guidance did not have a material impact on revenue most closely associated with financial instruments, including interest income and expense. The Bank completed its overall assessment of revenue streams and review of related contracts potentially affected by the ASU, including trust and asset management fees, deposit related fees, interchange fees, and merchant income. Salisbury’s revenue recognition policies conformed to Topic 606. As a result, no changes were required to be made to prior period financial statements due to the adoption of this ASU and no changes in revenue recognition were required in the three and nine month periods ending September 30, 2018.

In January 2016, the FASB issued ASU 2016-01, “Financial Instruments – overall (subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." This ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments by making targeted improvements to GAAP as follows: (1) require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer; (2) simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value; (3) eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities; (4) eliminate the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (5) require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (7) require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; and (8) clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU 2016-01 is effective for interim and annual reporting periods beginning after December 15, 2017. Salisbury adopted the provisions of this ASU effective January 1, 2018. Adoption of this ASU did not have a material impact on Salisbury’s financial statements. In accordance with (5) above, Salisbury measured the fair value of its loan portfolio as of September 30, 2018 using an exit price notion (see note 10).

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)”. Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee's obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard. All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. They have the option to use certain relief; full retrospective application is prohibited. Salisbury does not expect ASU 2016-02 to have a material impact on its consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, “Compensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. Some of the key provisions of this new ASU include: (1) companies will no longer record excess tax benefits and certain tax deficiencies in additional paid-in capital (“APIC”). Instead, they will record all excess tax benefits and tax deficiencies as income tax expense or benefit in the income statement, and APIC pools will be eliminated. The guidance also eliminates the requirement that excess tax benefits be realized before companies can recognize them. In addition, the guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity; (2) increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer’s statutory income tax withholding obligation. The new guidance will also require an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on its statement of cash flows (current guidance did not specify how these cash flows should be classified); and (3) permit companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards. Forfeitures can be estimated, as required today, or recognized when they occur. Salisbury has opted to recognize forfeitures as they occur as the impact is not expected to be material. Salisbury adopted ASU 2016-09 as of January 1, 2017. Adoption contributed a $105 thousand benefit to the tax provision in the second quarter 2017 and did not have a material effect on the financial results for the twelve month period ended December 31, 2017.

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which adds a new Topic 326 to the Codification and removes the thresholds that companies apply to measure credit losses on financial instruments measured at amortized cost, such as loans, receivables, and held-to-maturity debt securities. Under current U.S. GAAP, companies generally recognize credit losses when it is probable that the loss has been incurred. The revised guidance will remove all recognition thresholds and will require companies to recognize an allowance for credit losses for the difference between the amortized cost basis of a financial instrument and the amount of amortized cost that the company expects to collect over the instrument’s contractual life. ASU 2016-13 also amends the credit loss measurement guidance for available-for-sale debt securities and beneficial interests in securitized financial assets. The guidance in ASU 2016-13 is effective for “public business entities,” as defined, that are SEC filers for fiscal years and for interim periods with those fiscal years beginning after December 15, 2019. Early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Salisbury is currently evaluating the provisions of ASU 2016-13 to determine the potential impact the new standard will have on Salisbury’s Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments." This ASU is intended to reduce diversity in practice in how eight particular transactions are classified in the statement of cash flows. ASU 2016-15 is effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those years. Entities are required to apply the guidance retrospectively. If it is impracticable to apply the guidance retrospectively for an issue, the amendments related to that issue would be applied prospectively. Salisbury adopted ASU 2016-15 on January 1, 2018. ASU 2016-15 did not have a material impact on Salisbury’s Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business." This ASU is intended to add guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this update provide a screen to determine when a set of inputs, processes, and outputs is not a business. ASU 2017-01 is effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those years. Early adoption is permitted for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance, or for transactions in which a subsidiary is deconsolidated or a group of assets is derecognized that occur before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance. Entities should apply the guidance prospectively on or after the effective date. Salisbury adopted ASU 2017-01 on January 1, 2018. ASU 2017-01 did not impact Salisbury’s Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-04, “Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” This ASU is intended to allow companies to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The FASB is researching whether similar amendments should be considered for other entities, including public business entities. ASU 2017-04 is effective for public business entities that are SEC filers for fiscal years beginning after December 15, 2019 and interim periods within those years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Entities should apply the guidance prospectively. Salisbury is currently evaluating the provisions of ASU 2017-04 to determine the potential impact the new standard will have on Salisbury’s Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-08, “Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.” This ASU will amend the amortization period for certain purchased callable debt securities held at a premium. The Board is shortening the amortization period for the premium to the earliest call date. Under current generally accepted accounting principles, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. ASU 2017-08 is effective for public business entities for annual periods beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. Entities should apply the guidance on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Salisbury is currently evaluating the provisions of ASU 2017-08 and does not expect that the adoption of the new standard will have a material impact on Salisbury’s Consolidated Financial Statements.

In May 2017, the FASB issued ASU 2017-09, “Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting.” This ASU provides clarity in the accounting guidance regarding a change to the terms or conditions of a share-based payment award. ASU 2017-09 is effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Entities should apply the guidance prospectively to an award modified on or after the adoption date. Salisbury adopted ASU 2017-09 on January 1, 2018. ASU 2017-09 did not impact Salisbury’s Consolidated Financial Statements.