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Loans - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Number of loans modified | loan	2
Home equity
Amount of loan modified	$ 2.2
Commercial real estate
Amount of loan modified	$ 1.3
Loans
Financing Receivable, Practical Expedient, Accrued Interest Exclusion [true false]	true
Accrued interest on loans	$ 11.0	$ 11.7
Maximum
Guarantee percentage of SBA Loan	90.00%

X

- Definition

The amount of accrued interest on loans as of balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	unty_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

No definition available.

+ Details

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X

- Definition

Guarantee percentage of SBA Loan

+ References

No definition available.

+ Details

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X

- Definition

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Indicates (true false) whether practical expedient was elected to exclude accrued interest from financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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- Details

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- Details

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- Details

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