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Regulatory Capital (Schedule of Future Basel III Capital Requirements) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Leverage ratio 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Tier 1 capital ratio 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Tier 2 4.00%unty_TierTwoRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets  
Total capital ratio 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Scenario Forecast, Final [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Leverage ratio 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember		  
Common equity tier 1 capital (CET1) ratio 4.50%unty_CommonEquityTierOneCapitalRatio
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember		  
Additional tier 1 1.50%unty_AdditionalTierOneCapitalRatio
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember		  
Tier 1 capital ratio 6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember		  
Tier 2 2.00%unty_TierTwoRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember		  
Total capital ratio 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ us-gaap_StatementScenarioAxis
= unty_ScenarioForecastFinalMember