Fair Value - Fair Value on a Nonrecurring Basis Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair Value
Valuation allowance	$ 971	$ 995

Amount of allowance for credit losses related to recorded investment.

No definition available.

Name:	unty_FinancingReceivableImpairedRelatedAllowance
Namespace Prefix:	unty_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant