Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Univest Corporation of Pennsylvania (the Corporation or Univest) and its wholly owned subsidiaries; the Corporation’s primary subsidiary is Univest Bank and Trust Co. (the Bank). All significant intercompany balances and transactions have been eliminated in consolidation. The unaudited interim consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) have been condensed or omitted pursuant to such rules and regulations for interim financial information. The accompanying unaudited consolidated financial statements reflect all adjustments which are of a normal recurring nature and are, in the opinion of management, necessary for a fair presentation of the financial statements for the interim periods presented. Certain prior period amounts have been reclassified to conform to the current-year presentation. Operating results for the three-month period ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016. It is suggested that these unaudited consolidated financial statements be read in conjunction with the audited financial statements and the notes thereto included in the registrant’s Annual Report on Form 10-K for the year ended December 31, 2015, which was filed with the SEC on March 4, 2016. Use of Estimates The preparation of the unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes include fair value measurement of investment securities available-for-sale and assessment for impairment of certain investment securities, reserve for loan and lease losses, valuation of goodwill and other intangible assets, mortgage servicing rights, deferred tax assets and liabilities, benefit plans and stock-based compensation expense. Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) to simplify and improve employee share-based payment accounting. Under the new guidance, all excess tax benefits and tax deficiencies are recognized as an income tax benefit or expense in the income statement. The additional paid-in capital pool is eliminated. Excess tax benefits and deficiencies are recognized in the period they are deducted on the income tax return. Excess tax benefits are recorded along with other income tax cash flows as an operating activity in the statement of cash flows. The recognition of excess tax benefits and deficiencies and changes to diluted earnings per share are to be applied prospectively when this ASU is adopted. For tax benefits that were not previously recognized because the related tax deduction had not reduced taxes payable, entities record a cumulative-effect adjustment in retained earnings as of the beginning of the year of adoption. The Corporation does not record deferred tax benefits on incentive stock options when expense is accrued, therefore, the Corporation will not have a cumulative-effect adjustment when this ASU is adopted. Changes to the treatment of forfeitures will not impact the Corporation as the historical assumption for forfeitures was immaterial and not taken into account during valuations; the Corporation has recorded forfeitures as they occurred which is consistent with the new guidance. The ASU is effective for fiscal years beginning after December 15, 2016, and interim periods within those years for public business entities, or January 1, 2017 for the Corporation. Early adoption is permitted in any interim or annual period provided that the entire ASU is adopted. The Corporation does not anticipate that the adoption of this ASU will have a material impact on the financial statements. In March 2016, the FASB issued an ASU to amend the guidance for hedge accounting to clarify that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not require de-designation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The amendments in this ASU are effective for financial statements of public businesses issued for fiscal years and interim periods within those years beginning after December 15, 2016, or January 1, 2017 for the Corporation. The Corporation does not anticipate the adoption of this ASU will have any impact on the financial statements. In February 2016, the FASB issued an ASU to revise the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for all leases. 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. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. These practical expedients relate to the identification and classification of leases that commenced before the effective date, initial direct costs for leases that commenced before the effective date, and the ability to use hindsight in evaluating lessee options to extend or terminate a lease or to purchase the underlying asset. An entity that elects to apply the practical expedients will, in effect, continue to account for leases that commence before the effective date in accordance with previous GAAP unless the lease is modified, except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous GAAP. The ASU is effective for the first interim period within annual periods beginning after December 15, 2018, or January 1, 2019, with early adoption permitted. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements; however, the adoption of this ASU will impact the balance sheet for the recording of assets and liabilities for operating leases; any initial or continued impact of the recording of assets will have an impact on risk-based capital ratios under current regulatory guidance and possibly equity ratios. In January 2016, the FASB issued an ASU to address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The ASU will require equity investments to be measured at fair value with changes in fair value recognized in net income. When fair value is not readily determinable, an entity may elect to measure the equity investment at cost, minus impairment, plus or minus any change in the investment’s observable price. The ASU will 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. A valuation allowance on a deferred tax asset related to available-for-sale securities will need to be included. For financial liabilities that are measured at fair value, the ASU requires an entity to present separately, in other comprehensive income, any change in fair value resulting from a change in instrument-specific credit risk. An entity should apply the amendments by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. The amendments in this ASU are effective for fiscal years, including interim periods within those fiscal years, beginning after December 15, 2017 or January 1, 2018 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements. In September 2015, the FASB issued an ASU simplifying the accounting for measurement-period adjustments related to business combinations. The ASU eliminates the requirement to retrospectively adjust the financial statements for measurement-period adjustments that occur in periods after a business combination is consummated. Under this ASU, measurement-period adjustments are calculated as if they were known at the acquisition date, but are recognized in the reporting period in which they are determined. The ASU requires additional disclosures about the impact on current period income statement line items of adjustments that would have been recognized in prior periods if prior period information had been revised. The amendments in this ASU were effective for financial statements of public businesses issued for fiscal years and interim periods within those years beginning after December 15, 2015, or January 1, 2016 for the Corporation. The adoption of this guidance did not impact the Corporation's financial statements. In April 2015, the FASB issued an ASU simplifying the presentation of debt issuance costs. The ASU requires that debt issuance costs related to a recognized debt liability shall be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The costs will continue to be amortized to interest expense using the effective interest method. The ASU was effective for financial statements of public businesses issued for fiscal years beginning after December 15, 2015, or January 1, 2016 for the Corporation. The adoption of this ASU did not impact the Corporation's balance sheet presentation as the Corporation followed this presentation consistent with the guidance in FASB Concepts Statement No. 6. In May 2014, the FASB issued an ASU regarding revenue from contracts with customers which clarifies the principles for recognizing revenue and develops a common standard for U.S. GAAP and International Financial Reporting Standards. The ASU establishes a core principle that would require an entity to identify the contract(s) with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract and recognize revenue when (or as) the entity satisfies a performance obligation. The ASU provides for improved disclosure requirements that require entities to disclose sufficient information that enables users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In March 2016, the FASB issued an ASU clarifying the implementation guidance on the principal-versus-agent considerations in the revenue recognition standard by instructing the participants in the sale to determine whether they control the good or service and are entitled to the gross amount of the transaction or are acting as an agent and should collect only a fee or commission for arranging the sale. The original effective date of the guidance relating to revenue from contracts with customers was deferred in August 2015 by one year. This guidance is now effective for fiscal years and interim periods within those years beginning after December 15, 2017, or January 1, 2018 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements; however, it is anticipated the impact will be only related to timing.

Summary of Significant Accounting Policies

Principles of Consolidation and Basis of Presentation

The accompanying unaudited consolidated financial statements include the accounts of Univest Corporation of Pennsylvania (the Corporation or Univest) and its wholly owned subsidiaries; the Corporation’s primary subsidiary is Univest Bank and Trust Co. (the Bank). All significant intercompany balances and transactions have been eliminated in consolidation. The unaudited interim consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) have been condensed or omitted pursuant to such rules and regulations for interim financial information. The accompanying unaudited consolidated financial statements reflect all adjustments which are of a normal recurring nature and are, in the opinion of management, necessary for a fair presentation of the financial statements for the interim periods presented. Certain prior period amounts have been reclassified to conform to the current-year presentation. Operating results for the three-month period ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016. It is suggested that these unaudited consolidated financial statements be read in conjunction with the audited financial statements and the notes thereto included in the registrant’s Annual Report on Form 10-K for the year ended December 31, 2015, which was filed with the SEC on March 4, 2016.

Use of Estimates

The preparation of the unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes include fair value measurement of investment securities available-for-sale and assessment for impairment of certain investment securities, reserve for loan and lease losses, valuation of goodwill and other intangible assets, mortgage servicing rights, deferred tax assets and liabilities, benefit plans and stock-based compensation expense.

Recent Accounting Pronouncements

In March 2016, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) to simplify and improve employee share-based payment accounting. Under the new guidance, all excess tax benefits and tax deficiencies are recognized as an income tax benefit or expense in the income statement. The additional paid-in capital pool is eliminated. Excess tax benefits and deficiencies are recognized in the period they are deducted on the income tax return. Excess tax benefits are recorded along with other income tax cash flows as an operating activity in the statement of cash flows. The recognition of excess tax benefits and deficiencies and changes to diluted earnings per share are to be applied prospectively when this ASU is adopted. For tax benefits that were not previously recognized because the related tax deduction had not reduced taxes payable, entities record a cumulative-effect adjustment in retained earnings as of the beginning of the year of adoption. The Corporation does not record deferred tax benefits on incentive stock options when expense is accrued, therefore, the Corporation will not have a cumulative-effect adjustment when this ASU is adopted. Changes to the treatment of forfeitures will not impact the Corporation as the historical assumption for forfeitures was immaterial and not taken into account during valuations; the Corporation has recorded forfeitures as they occurred which is consistent with the new guidance. The ASU is effective for fiscal years beginning after December 15, 2016, and interim periods within those years for public business entities, or January 1, 2017 for the Corporation. Early adoption is permitted in any interim or annual period provided that the entire ASU is adopted. The Corporation does not anticipate that the adoption of this ASU will have a material impact on the financial statements.

In March 2016, the FASB issued an ASU to amend the guidance for hedge accounting to clarify that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not require de-designation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The amendments in this ASU are effective for financial statements of public businesses issued for fiscal years and interim periods within those years beginning after December 15, 2016, or January 1, 2017 for the Corporation. The Corporation does not anticipate the adoption of this ASU will have any impact on the financial statements.

In February 2016, the FASB issued an ASU to revise the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for all leases. 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. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. These practical expedients relate to the identification and classification of leases that commenced before the effective date, initial direct costs for leases that commenced before the effective date, and the ability to use hindsight in evaluating lessee options to extend or terminate a lease or to purchase the underlying asset. An entity that elects to apply the practical expedients will, in effect, continue to account for leases that commence before the effective date in accordance with previous GAAP unless the lease is modified, except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous GAAP. The ASU is effective for the first interim period within annual periods beginning after December 15, 2018, or January 1, 2019, with early adoption permitted. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements; however, the adoption of this ASU will impact the balance sheet for the recording of assets and liabilities for operating leases; any initial or continued impact of the recording of assets will have an impact on risk-based capital ratios under current regulatory guidance and possibly equity ratios.

In January 2016, the FASB issued an ASU to address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The ASU will require equity investments to be measured at fair value with changes in fair value recognized in net income. When fair value is not readily determinable, an entity may elect to measure the equity investment at cost, minus impairment, plus or minus any change in the investment’s observable price. The ASU will 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. A valuation allowance on a deferred tax asset related to available-for-sale securities will need to be included. For financial liabilities that are measured at fair value, the ASU requires an entity to present separately, in other comprehensive income, any change in fair value resulting from a change in instrument-specific credit risk. An entity should apply the amendments by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. The amendments in this ASU are effective for fiscal years, including interim periods within those fiscal years, beginning after December 15, 2017 or January 1, 2018 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements.

In September 2015, the FASB issued an ASU simplifying the accounting for measurement-period adjustments related to business combinations. The ASU eliminates the requirement to retrospectively adjust the financial statements for measurement-period adjustments that occur in periods after a business combination is consummated. Under this ASU, measurement-period adjustments are calculated as if they were known at the acquisition date, but are recognized in the reporting period in which they are determined. The ASU requires additional disclosures about the impact on current period income statement line items of adjustments that would have been recognized in prior periods if prior period information had been revised. The amendments in this ASU were effective for financial statements of public businesses issued for fiscal years and interim periods within those years beginning after December 15, 2015, or January 1, 2016 for the Corporation. The adoption of this guidance did not impact the Corporation's financial statements.

In April 2015, the FASB issued an ASU simplifying the presentation of debt issuance costs. The ASU requires that debt issuance costs related to a recognized debt liability shall be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The costs will continue to be amortized to interest expense using the effective interest method. The ASU was effective for financial statements of public businesses issued for fiscal years beginning after December 15, 2015, or January 1, 2016 for the Corporation. The adoption of this ASU did not impact the Corporation's balance sheet presentation as the Corporation followed this presentation consistent with the guidance in FASB Concepts Statement No. 6.

In May 2014, the FASB issued an ASU regarding revenue from contracts with customers which clarifies the principles for recognizing revenue and develops a common standard for U.S. GAAP and International Financial Reporting Standards. The ASU establishes a core principle that would require an entity to identify the contract(s) with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract and recognize revenue when (or as) the entity satisfies a performance obligation. The ASU provides for improved disclosure requirements that require entities to disclose sufficient information that enables users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In March 2016, the FASB issued an ASU clarifying the implementation guidance on the principal-versus-agent considerations in the revenue recognition standard by instructing the participants in the sale to determine whether they control the good or service and are entitled to the gross amount of the transaction or are acting as an agent and should collect only a fee or commission for arranging the sale. The original effective date of the guidance relating to revenue from contracts with customers was deferred in August 2015 by one year. This guidance is now effective for fiscal years and interim periods within those years beginning after December 15, 2017, or January 1, 2018 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on the Corporation's financial statements; however, it is anticipated the impact will be only related to timing.