New Authoritative Accounting Guidance	3 Months Ended
Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
New Authoritative Accounting Guidance	New Authoritative Accounting Guidance New Accounting Guidance Adopted in the First Quarter of 2018 Accounting Standards Update (ASU) No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities" amends the hedge accounting recognition and presentation requirements to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. ASU No. 2017-12 is effective for the annual and interim reporting periods beginning January 1, 2019 with early adoption permitted. Valley elected to early adopt ASU No. 2017-12 for annual and interim reporting periods beginning January 1, 2018. The adoption of ASU No. 2017-12 required a modified retrospective method to be used by Valley and resulted in an immaterial cumulative-effect adjustment to retained earnings as of January 1, 2018 to eliminate the separate measurement of ineffectiveness from accumulated comprehensive income (see Note 4). ASU No. 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" requires service cost to be reported in the same financial statement line item(s) as other current employee compensation costs. All other components of expense must be presented separately from service cost, and outside any subtotal of income from operations. Only the service cost component of expense is eligible to be capitalized. ASU No. 2017-07 should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. ASU No. 2017-07 was effective for Valley for its annual and interim reporting periods beginning January 1, 2018. ASU No. 2017-07 did not have a significant impact on the presentation of Valley's consolidated financial statements. ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Asset Transfers of Assets Other than Inventory”. Under current GAAP, the tax effects of intercompany sales are deferred until the transferred asset is sold to a third party or otherwise recovered through amortization. This is an exception to the accounting for income taxes that generally requires recognition of current and deferred income taxes. ASU No. 2016-16 eliminates the exception for intercompany sales of assets. ASU No. 2016-16 was effective for Valley on January 1, 2018 and it was applied using the modified retrospective method. As a result, Valley recorded a $15.4 million cumulative effect adjustment that reduced retained earnings effective January 1, 2018 to record net deferred tax liabilities related to pre-existing transactions. ASU No. 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments" clarifies how certain cash receipts and cash payments should be classified and presented in the statement of cash flows. ASU No. 2016-15 includes guidance on eight specific cash flow issues with the objective of reducing the existing diversity of practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. ASU No. 2016-15 was effective for Valley for annual and interim reporting periods beginning January 1, 2018 and it was applied using a retrospective transition method to each period presented. ASU No. 2016-15 did not have a significant impact on the presentation of Valley's consolidated statements of cash flows. ASU No. 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities” requires that: (i) equity investments with readily determinable fair values must be measured at fair value with changes in fair value recognized in net income, (ii) equity investments without readily determinable fair values must be measured at either fair value or at cost adjusted for changes in observable prices minus impairment with changes in value under either of these methods recognized in net income, (iii) entities that record financial liabilities at fair value due to a fair value option election must recognize changes in fair value in other comprehensive income if it is related to instrument-specific credit risk, (iv) entities must assess whether a valuation allowance is required for deferred tax assets related to available-for-sale debt securities, and (v) entities are required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. ASU No. 2016-01 also eliminates the requirement for public business entities to disclose the methods 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 (see Note 6). ASU No. 2016-01 was effective for Valley for reporting periods beginning January 1, 2018 and did not have a material effect on Valley’s consolidated financial statements. ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)" and subsequent related updates modify the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of non-financial assets, unless those contracts are within the scope of other guidance. The updates also require new qualitative and quantitative disclosures, including disaggregation of revenues and descriptions of performance obligations. Valley adopted the guidance on January 1, 2018 using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings. The guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP. Accordingly, the new revenue recognition standard was not expected to have a material impact on Valley’s consolidated financial statements. Valley has completed its review of non-interest income revenue streams within the scope of the guidance and an assessment of its revenue contracts and did not identify material changes related to the timing or amount of revenue recognition. Therefore, Valley did not record an adjustment to opening retained earnings at January 1, 2018 due to the adoption of this standard. Valley has also concluded that additional disaggregation of revenue categories (as reported herein and consistent with the Annual Report on Form 10-K for the year ended December 31, 2017) that are within the scope of the new guidance is not necessary. Qualitative disclosures regarding such revenues, as required by the new guidance, are presented in Note 12. New Accounting Guidance Not Yet Adopted ASU No. 2017-08, "Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities" shortens the amortization period for certain callable debt securities held at a premium. ASU No. 2017-08 requires the premium to be amortized to the earliest call date. The accounting for securities held at a discount does not change and the discount continues to be amortized as an adjustment to yield over the contractual life (to maturity) of the instrument. ASU No. 2017-08 is effective for Valley for the annual and interim reporting periods beginning January 1, 2019 with early adoption permitted, and is to be applied using modified retrospective method. Additionally, in the period of adoption, entities should provide disclosures about a change in accounting principle. ASU No. 2017-08 is not expected to have a significant impact on Valley's consolidated financial statements. ASU No. 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" eliminates the requirement to calculate the implied fair value of goodwill (i.e., Step 2 of the current goodwill impairment test guidance) to measure a goodwill impairment charge. Instead, an entity will be required to record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on Step 1 of the current guidance). In addition, ASU No. 2017-04 eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. However, an entity will be required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. ASU No. 2017-04 is effective for Valley for its annual or any interim goodwill impairment tests in fiscal years beginning January 1, 2020 and is not expected to have a significant impact on the presentation of Valley's consolidated financial statements. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments" amends the accounting guidance on the impairment of financial instruments. ASU No. 2016-13 adds to U.S. GAAP an impairment model (known as the current expected credit loss (CECL) model) that is based on all expected losses over the lives of the assets rather than incurred losses. Under the new guidance, an entity is required to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. ASU No. 2016-13 is effective for Valley for reporting periods beginning January 1, 2020. Management is currently evaluating the impact of the ASU on Valley’s consolidated financial statements. Management has initiated a working group with multiple members from applicable departments to evaluate the requirements of the new standard, planning for loss modeling requirements consistent with lifetime expected loss estimates, and assessing the impact it will have on current processes. Valley expects that the adoption of ASU No. 2016-13 will result in an increase in its allowance for credit losses due to several factors, including: (i) the allowance related to Valley loans will increase to include credit losses over the full remaining expected life of the portfolio, and will consider expected future changes in macroeconomic conditions, (ii) the nonaccretable difference (as defined in Note 8) on PCI loans will be recognized as an allowance, offset by an increase in the carrying value of the related loans, and (iii) an allowance will be established for estimated credit losses on investment securities classified as held to maturity. The extent of the increase is under evaluation, but will depend upon the nature and characteristics of Valley's loan and investment portfolios at the adoption date, and the economic conditions and forecasts at that date. ASU No. 2016-02, “Leases (Topic 842)” requires the recognition of a right of use asset and related lease liability by lessees for leases classified as operating leases under current GAAP. Topic 842, which replaces the current guidance under Topic 840, retains a distinction between finance leases and operating leases. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee also will not significantly change from current GAAP. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize right of use assets and lease liabilities. Topic 842 will be effective for Valley for reporting periods beginning January 1, 2019, with early adoption permitted. Valley must apply a modified retrospective transition approach for the applicable leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Management is currently evaluating the impact of Topic 842 on Valley’s consolidated financial statements and presently evaluating all of its known leases for compliance with the new lease accounting guidance. Management has also made substantial progress in the review of contractual arrangements for embedded leases in an effort to identify Valley’s full lease population. Valley expects a gross-up of its consolidated statements of financial condition as a result of recognizing lease liabilities and right of use assets; the extent of such gross-up is under evaluation. Valley does not expect material changes to the recognition of operating lease expense in its consolidated statements of income.

New Authoritative Accounting Guidance

New Accounting Guidance Adopted in the First Quarter of 2018

Accounting Standards Update (ASU) No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities" amends the hedge accounting recognition and presentation requirements to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. ASU No. 2017-12 is effective for the annual and interim reporting periods beginning January 1, 2019 with early adoption permitted. Valley elected to early adopt ASU No. 2017-12 for annual and interim reporting periods beginning January 1, 2018. The adoption of ASU No. 2017-12 required a modified retrospective method to be used by Valley and resulted in an immaterial cumulative-effect adjustment to retained earnings as of January 1, 2018 to eliminate the separate measurement of ineffectiveness from accumulated comprehensive income (see Note 4).

ASU No. 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" requires service cost to be reported in the same financial statement line item(s) as other current employee compensation costs. All other components of expense must be presented separately from service cost, and outside any subtotal of income from operations. Only the service cost component of expense is eligible to be capitalized. ASU No. 2017-07 should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. ASU No. 2017-07 was effective for Valley for its annual and interim reporting periods beginning January 1, 2018. ASU No. 2017-07 did not have a significant impact on the presentation of Valley's consolidated financial statements.

ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Asset Transfers of Assets Other than Inventory”. Under current GAAP, the tax effects of intercompany sales are deferred until the transferred asset is sold to a third party or otherwise recovered through amortization. This is an exception to the accounting for income taxes that generally requires recognition of current and deferred income taxes. ASU No. 2016-16 eliminates the exception for intercompany sales of assets. ASU No. 2016-16 was effective for Valley on January 1, 2018 and it was applied using the modified retrospective method. As a result, Valley recorded a $15.4 million cumulative effect adjustment that reduced retained earnings effective January 1, 2018 to record net deferred tax liabilities related to pre-existing transactions.

ASU No. 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments" clarifies how certain cash receipts and cash payments should be classified and presented in the statement of cash flows. ASU No. 2016-15 includes guidance on eight specific cash flow issues with the objective of reducing the existing diversity of practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. ASU No. 2016-15 was effective for Valley for annual and interim reporting periods beginning January 1, 2018 and it was applied using a retrospective transition method to each period presented. ASU No. 2016-15 did not have a significant impact on the presentation of Valley's consolidated statements of cash flows.

ASU No. 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities” requires that: (i) equity investments with readily determinable fair values must be measured at fair value with changes in fair value recognized in net income, (ii) equity investments without readily determinable fair values must be measured at either fair value or at cost adjusted for changes in observable prices minus impairment with changes in value under either of these methods recognized in net income, (iii) entities that record financial liabilities at fair value due to a fair value option election must recognize changes in fair value in other comprehensive income if it is related to instrument-specific credit risk, (iv) entities must assess whether a valuation allowance is required for deferred tax assets related to available-for-sale debt securities, and (v) entities are required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. ASU No. 2016-01 also eliminates the requirement for public business entities to disclose the methods 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 (see Note 6). ASU No. 2016-01 was effective for Valley for reporting periods beginning January 1, 2018 and did not have a material effect on Valley’s consolidated financial statements.

ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)" and subsequent related updates modify the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of non-financial assets, unless those contracts are within the scope of other guidance. The updates also require new qualitative and quantitative disclosures, including disaggregation of revenues and descriptions of performance obligations. Valley adopted the guidance on January 1, 2018 using the modified retrospective method with a cumulative-effect adjustment to opening retained earnings. The guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP. Accordingly, the new revenue recognition standard was not expected to have a material impact on Valley’s consolidated financial statements. Valley has completed its review of non-interest income revenue streams within the scope of the guidance and an assessment of its revenue contracts and did not identify material changes related to the timing or amount of revenue recognition. Therefore, Valley did not record an adjustment to opening retained earnings at January 1, 2018 due to the adoption of this standard. Valley has also concluded that additional disaggregation of revenue categories (as reported herein and consistent with the Annual Report on Form 10-K for the year ended December 31, 2017) that are within the scope of the new guidance is not necessary. Qualitative disclosures regarding such revenues, as required by the new guidance, are presented in Note 12.

New Accounting Guidance Not Yet Adopted

ASU No. 2017-08, "Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities" shortens the amortization period for certain callable debt securities held at a premium. ASU No. 2017-08 requires the premium to be amortized to the earliest call date. The accounting for securities held at a discount does not change and the discount continues to be amortized as an adjustment to yield over the contractual life (to maturity) of the instrument. ASU No. 2017-08 is effective for Valley for the annual and interim reporting periods beginning January 1, 2019 with early adoption permitted, and is to be applied using modified retrospective method. Additionally, in the period of adoption, entities should provide disclosures about a change in accounting principle. ASU No. 2017-08 is not expected to have a significant impact on Valley's consolidated financial statements.

ASU No. 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" eliminates the requirement to calculate the implied fair value of goodwill (i.e., Step 2 of the current goodwill impairment test guidance) to measure a goodwill impairment charge. Instead, an entity will be required to record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on Step 1 of the current guidance). In addition, ASU No. 2017-04 eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. However, an entity will be required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. ASU No. 2017-04 is effective for Valley for its annual or any interim goodwill impairment tests in fiscal years beginning January 1, 2020 and is not expected to have a significant impact on the presentation of Valley's consolidated financial statements. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017.

ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments" amends the accounting guidance on the impairment of financial instruments. ASU No. 2016-13 adds to U.S. GAAP an impairment model (known as the current expected credit loss (CECL) model) that is based on all expected losses over the lives of the assets rather than incurred losses. Under the new guidance, an entity is required to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. ASU No. 2016-13 is effective for Valley for reporting periods beginning January 1, 2020. Management is currently evaluating the impact of the ASU on Valley’s consolidated financial statements. Management has initiated a working group with multiple members from applicable departments to evaluate the requirements of the new standard, planning for loss modeling requirements consistent with lifetime expected loss estimates, and assessing the impact it will have on current processes. Valley expects that the adoption of ASU No. 2016-13 will result in an increase in its allowance for credit losses due to several factors, including: (i) the allowance related to Valley loans will increase to include credit losses over the full remaining expected life of the portfolio, and will consider expected future changes in macroeconomic conditions, (ii) the nonaccretable difference (as defined in Note 8) on PCI loans will be recognized as an allowance, offset by an increase in the carrying value of the related loans, and (iii) an allowance will be established for estimated credit losses on investment securities classified as held to maturity. The extent of the increase is under evaluation, but will depend upon the nature and characteristics of Valley's loan and investment portfolios at the adoption date, and the economic conditions and forecasts at that date.

ASU No. 2016-02, “Leases (Topic 842)” requires the recognition of a right of use asset and related lease liability by lessees for leases classified as operating leases under current GAAP. Topic 842, which replaces the current guidance under Topic 840, retains a distinction between finance leases and operating leases. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee also will not significantly change from current GAAP. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize right of use assets and lease liabilities. Topic 842 will be effective for Valley for reporting periods beginning January 1, 2019, with early adoption permitted. Valley must apply a modified retrospective transition approach for the applicable leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Management is currently evaluating the impact of Topic 842 on Valley’s consolidated financial statements and presently evaluating all of its known leases for compliance with the new lease accounting guidance. Management has also made substantial progress in the review of contractual arrangements for embedded leases in an effort to identify Valley’s full lease population. Valley expects a gross-up of its consolidated statements of financial condition as a result of recognizing lease liabilities and right of use assets; the extent of such gross-up is under evaluation. Valley does not expect material changes to the recognition of operating lease expense in its consolidated statements of income.