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Borrowed Funds and Subordinated Debentures (Narrative) (Details) (USD $)
 24 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]        
Subordinated debentures $ 15,465,000us-gaap_SubordinatedDebt $ 15,465,000us-gaap_SubordinatedDebt $ 15,465,000us-gaap_SubordinatedDebt  
Marketable Securities, Equity Securities 465,000us-gaap_MarketableSecuritiesEquitySecurities 465,000us-gaap_MarketableSecuritiesEquitySecurities 465,000us-gaap_MarketableSecuritiesEquitySecurities  
FHLB Advances [Member]        
Debt Instrument [Line Items]        
Number of FHLB Advances 6unty_NumberOfFhlbAdvances
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		 6unty_NumberOfFhlbAdvances
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		 3unty_NumberOfFhlbAdvances
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		  
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 10,000,000us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		 10,000,000us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		 10,000,000us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
/ us-gaap_LongtermDebtTypeAxis
= unty_FhlbAdvancesMember		  
Repurchase Agreements [Member]        
Debt Instrument [Line Items]        
Number of FHLB Repurchase Agreements     3unty_NumberOfFhlbRepurchaseAgreements
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		  
Secured Debt, Repurchase Agreements     10,000,000us-gaap_SecuredDebtRepurchaseAgreements
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		  
Subordinated Debenture July 24, 2006 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Maturity Date Jul. 24, 2036      
Subordinated debentures 10,000,000us-gaap_SubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		 10,000,000us-gaap_SubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		    
Debt Instrument, Interest Rate at Period End 1.84%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		 1.84%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		 1.84%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		  
Debt Instrument, Basis Spread on Variable Rate 1.59%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureJuly242006Member		      
Subordinated Debenture December 19, 2006 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Maturity Date   Dec. 19, 2036    
Subordinated debentures 5,000,000us-gaap_SubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		 5,000,000us-gaap_SubordinatedDebt
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		    
Debt Instrument, Interest Rate at Period End 1.89%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		 1.89%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		 1.89%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		  
Debt Instrument, Basis Spread on Variable Rate   1.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= unty_SubordinatedDebentureDecember192006Member		    
Securities Sold under Agreements to Repurchase [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.67%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		 3.67%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		    
Debt Instrument, Maturity Date Feb. 28, 2018      
Debt Instrument, Term 10 years      
Debt Instrument, Interest Rate at Period End 3.67%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		 3.67%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		 3.67%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		 3.67%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember
Secured Debt, Repurchase Agreements 15,000,000us-gaap_SecuredDebtRepurchaseAgreements
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		 15,000,000us-gaap_SecuredDebtRepurchaseAgreements
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember		    
Subordinated Debentures Subject to Mandatory Redemption [Member]        
Debt Instrument [Line Items]        
Maximum period to defer interest payment without default   5 years    
Parent Company Only [Member]        
Debt Instrument [Line Items]        
Subordinated debentures 15,465,000us-gaap_SubordinatedDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember		 15,465,000us-gaap_SubordinatedDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember		 15,465,000us-gaap_SubordinatedDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember		  
FHLB advance April 27, 2015 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 3.70%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance1Member		 3.70%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance1Member		    
Debt Instrument, Maturity Date   Apr. 27, 2015    
FHLB advance November 2, 2016 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 4.03%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance2Member		 4.03%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance2Member		    
Debt Instrument, Maturity Date   Nov. 02, 2016    
FHLB advance August 10, 2017 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 4.23%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance3Member		 4.23%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance3Member		    
Debt Instrument, Maturity Date   Aug. 10, 2017    
FHLB advance December 15, 2016 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 4.19%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance4Member		 4.19%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance4Member		    
Debt Instrument, Maturity Date   Dec. 15, 2016    
FHLB advance April 5, 2017 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 4.27%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance5Member		 4.27%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance5Member		    
Debt Instrument, Maturity Date   Apr. 05, 2017    
FHLB advance December 20, 2017 [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate 3.40%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance6Member		 3.40%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FhlbAdvance6Member		    
Debt Instrument, Maturity Date   Dec. 20, 2017    
FHLB Overnight Line of Credit [Member]        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available $ 50,000,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FederalHomeLoanBankOvernightLineOfCreditMember		 $ 50,000,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FederalHomeLoanBankOvernightLineOfCreditMember		 $ 32,000,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FederalHomeLoanBankOvernightLineOfCreditMember		  
Debt Instrument, Interest Rate, Stated Percentage 0.32%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FederalHomeLoanBankOvernightLineOfCreditMember		 0.32%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= unty_FederalHomeLoanBankOvernightLineOfCreditMember