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Loans (Troubled Debt Restructurings Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Average Recorded Investment $ 12,802us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment $ 19,693us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Impaired Financing Receivable, Related Allowance 1,161us-gaap_ImpairedFinancingReceivableRelatedAllowance 1,138us-gaap_ImpairedFinancingReceivableRelatedAllowance
Percentage of loan portfolio secured by real estate 96.00%unty_PercentageOfLoanPortfolioSecuredByRealEstate 96.00%unty_PercentageOfLoanPortfolioSecuredByRealEstate
Transferred Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Loans in nonaccrual status 2,700us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= unty_TransferredLoansMember
 
Financing receivable, impaired, number 3unty_FinancingReceivableImpairedNumber
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= unty_TransferredLoansMember
 
Troubled Debt Restructuring (TDR) [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Average Recorded Investment 6,500us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
7,900us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
Impaired Financing Receivable, Related Allowance 223us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
410us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
Loans in nonaccrual status 3,000us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
467us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
Troubled Debt Restructuring (TDR) [Member] | Nonperforming Financing Receivable [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Related Allowance 199us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_NonperformingFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
47us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_NonperformingFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
Troubled Debt Restructuring (TDR) [Member] | Performing Financing Receivable [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Related Allowance $ 24us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_PerformingFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember
$ 363us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_PerformingFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= unty_TroubledDebtRestructuringTdrMember