v3.25.3

COMMITMENTS AND CONTINGENCIES (Outstanding following off-balance-sheet financial instruments) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	$ 118,296	$ 140,481
Variable Rate	603,174	586,821
Unused loan commitments
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	91,151	108,561
Variable Rate	603,174	586,821
Standby and commercial letters of credit
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	27,145	31,920
Variable Rate	$ 0	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 825
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478898/942-825-50-1

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478898/942-825-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
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-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478898/942-825-50-1

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at interest rates that increase or decrease depending on certain facts or circumstances.

+ References

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Metropolitan Bank Holding Corp. 10-Q