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Fair Value (Fair Value on a Recurring Basis) (Narrative) (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Percentage of Portfolio in Residential Mortgage Backed Securities 56.00%unty_PercentageOfPortfolioInResidentialMortgageBackedSecurities  
Residential mortgage backed securities guaranteed by Government National Mortgage Association or Federal National Mortgage Association or Federal Home Loan Mortgage Corporation $ 31,300,000unty_ResidentialMortgageBackedSecuritiesGuaranteedByGovernmentNationalMortgageAssociationOrFederalNationalMortgageAssociationOrFederalHomeLoanMortgageCorporation  
Available-for-sale Securities 57,875,000us-gaap_AvailableForSaleSecurities 60,073,000us-gaap_AvailableForSaleSecurities
Residential Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Securities $ 32,312,000us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 $ 34,383,000us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember