Fair Value (Fair Value On A Recurring Basis) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Fair Value [Abstract]
Percentage Of Portfolio In Residential Mortgage Backed Securities	52.00%
Residential Mortgage Backed Securities Guaranteed By Government National Mortgage Association Or Federal National Mortgage Association Or Federal Home Loan Mortgage Corporation	$ 46.2

Residential Mortgage Backed Securities Guaranteed By Government National Mortgage Association Or Federal National Mortgage Association Or Federal Home Loan Mortgage Corporation

No definition available.

Name:	unty_ResidentialMortgageBackedSecuritiesGuaranteedByGovernmentNationalMortgageAssociationOrFederalNationalMortgageAssociationOrFederalHomeLoanMortgageCorporation
Namespace Prefix:	unty_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant