Securities - Unrealized Loss Position (Details) - security	Dec. 31, 2024	Dec. 31, 2023
Securities
Number of securities in an unrealized loss position	75	98

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale),and (held to maturity) in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

No definition available.

Name:	unty_DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPositionNumberOfPositions
Namespace Prefix:	unty_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant