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Loans and Leases - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]    
Measure taken to reduce the risk of difference in actual value and residual value of the leased assets at maturity The Corporation greatly reduces this risk primarily by using $1.00 buyout leases, in which the entire cost of the leased equipment is included in the contractual payments, leaving no residual payment at the end of the lease terms.  
Other accruing impaired loans $ 33,800,000uvsp_OtherAccruingImpairedFinancingReceivableRecordedInvestment $ 27,500,000uvsp_OtherAccruingImpairedFinancingReceivableRecordedInvestment
Specific reserves for other accruing impaired loans 476,000uvsp_SpecificReserveForOtherAccruingImpairedLoans 1,600,000uvsp_SpecificReserveForOtherAccruingImpairedLoans
Maximum modification period on short-term basis up to one year  
Restructured loan past due period less than ninety days past due  
Minimum [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Amount of loan relationship with risk ratings of grade 1-5 reviewed quarterly 2,500,000uvsp_AmountOfLoanRelationshipUpToFiveGradeRatingsReviewedQuarterly
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Amount of loan relationship with risk ratings of grade 1-5 reviewed annually 500,000uvsp_AmountOfLoanRelationshipUpToFiveGradeRatingsReviewedAnnually
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= us-gaap_MinimumMember		  
Amount of loan relationship due for review after 60 or more past due days 500,000uvsp_AmountOfLoanRelationshipDueForReviewAfterSpecifiedPastDueDays
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= us-gaap_MinimumMember		  
Aging period due of reviewing loans rated 1 through 6 60 days  
Amount of loan relationship with risk ratings of grade six reviewed quarterly 2,000,000uvsp_AmountOfLoanRelationshipWithRiskRatingsOfGradeSixReviewedQuarterly
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= us-gaap_MinimumMember		  
Amount of loan relationship with risk ratings of grade six reviewed annually 500,000uvsp_AmountOfLoanRelationshipWithRiskRatingsOfGradeSixReviewedAnnually
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= us-gaap_MinimumMember		  
Loan-to-value ratio for residential mortgage loans with private mortgage insurance 80.00%uvsp_LoanToValueRatioForResidentialMortgageLoansWithPrivateMortgageInsurance
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= us-gaap_MinimumMember		  
Maximum [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Amount of loan relationship with risk ratings of grade 1-5 reviewed annually 2,500,000uvsp_AmountOfLoanRelationshipUpToFiveGradeRatingsReviewedAnnually
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Amount of loan relationship due for review after 60 or more past due days 500,000uvsp_AmountOfLoanRelationshipDueForReviewAfterSpecifiedPastDueDays
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= us-gaap_MaximumMember		  
Amount of loan relationship with risk ratings of grade six reviewed annually $ 2,000,000uvsp_AmountOfLoanRelationshipWithRiskRatingsOfGradeSixReviewedAnnually
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= us-gaap_MaximumMember		  
Loan-to-value ratio for residential mortgage loans without private mortgage insurance 80.00%uvsp_LoanToValueRatioForResidentialMortgageLoansWithoutPrivateMortgageInsurance
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= us-gaap_MaximumMember		  
Combined loan-to-value ratio for home equity loans without private mortgage insurance 80.00%uvsp_CombinedLoanToValueRatioForHomeEquityLoansWithoutPrivateMortgageInsurance
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= us-gaap_MaximumMember		  
Combined loan-to-value ratio for home equity loans without private mortgage insurance for corporations strongest profile borrower 85.00%uvsp_CombinedLoanToValueRatioForHomeEquityLoansWithoutPrivateMortgageInsuranceForStrongestProfileBorrower
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