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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
store
Number of Branches 15us-gaap_NumberOfStores
Number of wholly-owned subsidiaries 9unty_NumberOfWhollyOwnedSubsidiaries
Number of wholly-owned statutory trust subsidiaries 2unty_NumberOfWhollyOwnedStatutoryTrustSubsidiaries
Percentage of guaranteed by SBA 90.00%unty_GuaranteePercentageOfSbaLoan
Minimum [Member]  
Value for real estate appraisal for OREO or substance foreclosure 100,000unty_ValueForRealEstateAppraisalForOtherRealEstateOwnedOrSubstanceForeclosure
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Discount rate used to determine fair value 6.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]  
Discount rate used to determine fair value 10.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember