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Securities (Realized Gains and Losses) (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Securities [Abstract]      
Available-for-sale Securities, Gross Realized Gains   $ 114,000us-gaap_AvailableForSaleSecuritiesGrossRealizedGains  
Available-for-sale Securities, Gross Realized Losses   4,000us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses  
Available-for-sale Securities, book value   2,800,000unty_AvailableForSaleSecuritiesSoldSecurityAtCarryingValue  
Available-for-sale Securities, Gross Realized Gain (Loss) 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet 110,000us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet  
Available-for-sale Securities Pledged as Collateral 50,500,000us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral   50,400,000us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Available For Sale Securities Pledged As Collateral Against Government Deposits $ 31,500,000unty_AvailableForSaleSecuritiesPledgedAsCollateralAgainstGovernmentDeposits   $ 32,100,000unty_AvailableForSaleSecuritiesPledgedAsCollateralAgainstGovernmentDeposits