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Regulatory Capital Requirements (Tables) | 6 Months Ended
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Jun. 30, 2025
Regulatory Capital Requirements |
Schedule of regulatory capital ratios | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | First Hawaiian | ​ | Minimum | ​ | Well- | ​
​ | ​ | First Hawaiian, Inc. | ​ | Bank | ​ | Capital | ​ | Capitalized | ​
(dollars in thousands) |  | Amount |  | Ratio | ​ | Amount |  | Ratio | ​ | Ratio(1) |  | Ratio(1) | ​
June 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital to risk-weighted assets | ​ | $ | 2,105,036 | ​ | 13.03 | % | $ | 2,094,664 | ​ | 12.96 | % | 4.50 | % | 6.50 | %
Tier 1 capital to risk-weighted assets | ​ | ​ | 2,105,036 | ​ | 13.03 | % | ​ | 2,094,664 | ​ | 12.96 | % | 6.00 | % | 8.00 | %
Total capital to risk-weighted assets | ​ | ​ | 2,306,208 | ​ | 14.28 | % | ​ | 2,295,836 | ​ | 14.21 | % | 8.00 | % | 10.00 | %
Tier 1 capital to average assets (leverage ratio) | ​ | ​ | 2,105,036 | ​ | 9.12 | % | ​ | 2,094,664 | ​ | 9.07 | % | 4.00 | % | 5.00 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity tier 1 capital to risk-weighted assets | ​ | $ | 2,083,938 | ​ | 12.80 | % | $ | 2,070,403 | ​ | 12.71 | % | 4.50 | % | 6.50 | %
Tier 1 capital to risk-weighted assets | ​ | ​ | 2,083,938 | ​ | 12.80 | % | ​ | 2,070,403 | ​ | 12.71 | % | 6.00 | % | 8.00 | %
Total capital to risk-weighted assets | ​ | ​ | 2,277,178 | ​ | 13.99 | % | ​ | 2,263,643 | ​ | 13.90 | % | 8.00 | % | 10.00 | %
Tier 1 capital to average assets (leverage ratio) | ​ | ​ | 2,083,938 | ​ | 9.14 | % | ​ | 2,070,403 | ​ | 9.08 | % | 4.00 | % | 5.00 | %
(1) | As defined by the regulations issued by the Board of Governors of the Federal Reserve System, the Office of the Comptroller of the Currency, and Federal Deposit Insurance Corporation (“FDIC”).

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- 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
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