v3.25.4

REGULATORY CAPITAL (Tables)

12 Months Ended

Dec. 31, 2025

Regulatory Capital [Abstract]

Schedule of Bank's Capital and Ratio Amounts

The Company’s actual capital amounts and ratios are presented in the following table:

			Actual												For Capital Adequacy Purposes (1)												To Be Considered Well Capitalized
(In thousands)			Amount						Ratio						Amount						Ratio						Amount						Ratio
December, 31, 2025
Total capital to risk weighted assets			$	936,532					16.40		%				$	456,875					8.00		%				N/A						N/A
Tier 1 capital to risk weighted assets			812,379						14.23		%				342,656						6.00		%				N/A						N/A
Tier 1 capital to average assets			812,379						9.36		%				347,198						4.00		%				N/A						N/A
Common equity tier 1 to risk weighted assets			812,379						14.23		%				256,992						4.50		%				N/A						N/A
December, 31, 2024
Total capital to risk weighted assets			$	879,316					16.26		%				$	432,496					8.00		%				N/A						N/A
Tier 1 capital to risk weighted assets			751,394						13.90		%				324,372						6.00		%				N/A						N/A
Tier 1 capital to average assets			751,394						9.00		%				334,112						4.00		%				N/A						N/A
Common equity tier 1 to risk weighted assets			751,394						13.90		%				243,279						4.50		%				N/A						N/A

(1)Amounts are shown exclusive of the applicable capital conservation buffer of 2.50%.

The Bank’s actual capital amounts and ratios are presented in the following table:

			Actual												For Capital Adequacy Purposes (1)												To Be Considered Well Capitalized
(In thousands)			Amount						Ratio						Amount						Ratio						Amount						Ratio
December, 31, 2025
Total capital to risk weighted assets			$	890,991					15.64		%				$	455,612					8.00		%				$	569,515					10.00		%
Tier 1 capital to risk weighted assets			830,625						14.58		%				341,709						6.00		%				455,612						8.00		%
Tier 1 capital to average assets			830,625						9.63		%				345,109						4.00		%				431,387						5.00		%
Common equity tier 1 to risk weighted assets			830,625						14.58		%				256,282						4.50		%				370,185						6.50		%
December, 31, 2024
Total capital to risk weighted assets			$	829,871					15.35		%				$	432,493					8.00		%				$	540,616					10.00		%
Tier 1 capital to risk weighted assets			765,652						14.16		%				324,370						6.00		%				432,493						8.00		%
Tier 1 capital to average assets			765,652						9.17		%				334,109						4.00		%				417,637						5.00		%
Common equity tier 1 to risk weighted assets			765,652						14.16		%				243,277						4.50		%				351,400						6.50		%

(1)Amounts are shown exclusive of the applicable capital conservation buffer of 2.50%.

X

- Definition

Regulatory Capital [Abstract]

+ References

No definition available.

+ Details

Name:	amal_RegulatoryCapitalAbstract
Namespace Prefix:	amal_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

+ Details

Name:	us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration