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Regulatory Capital Requirements (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Common equity tier 1 capital to risk-weighted assets |  |
Amount | $ 1,777,705 | $ 1,717,008
Ratio (as a percent) | 12.63% | 12.47%
Minimum Capital Ratio (as a percent) | 4.50 | 4.50
Well-Capitalized Ratio (as a percent) | 6.50% | 6.50%
Tier 1 capital to risk-weighted assets |  |
Amount | $ 1,777,705 | $ 1,717,008
Ratio (as a percent) | 12.63 | 12.47
Minimum Capital Ratio (as a percent) | 6.00 | 6.00
Well-Capitalized Ratio (percent) | 8.00 | 8.00
Total capital to risk-weighted assets |  |
Amount | $ 1,953,878 | $ 1,889,958
Ratio (as a percent) | 13.88 | 13.73
Minimum Capital Ratio (as a percent) | 8.00 | 8.00
Well-Capitalized Ratio (as a percent) | 10.00 | 10.00
Tier 1 capital to average assets (leverage ratio) |  |
Amount | $ 1,777,705 | $ 1,717,008
Ratio | 7.39 | 8.00
Minimum Capital Ratio (as a percent) | 4.00 | 4.00
Well-Capitalized Ratio (percent) | 5.00 | 5.00
First Hawaiian Bank (FHB) |  |
Common equity tier 1 capital to risk-weighted assets |  |
Amount | $ 1,764,464 | $ 1,699,485
Ratio (as a percent) | 12.53% | 12.34%
Tier 1 capital to risk-weighted assets |  |
Amount | $ 1,764,464 | $ 1,699,485
Ratio (as a percent) | 12.53 | 12.34
Total capital to risk-weighted assets |  |
Amount | $ 1,940,638 | $ 1,872,427
Ratio (as a percent) | 13.79 | 13.60
Tier 1 capital to average assets (leverage ratio) |  |
Amount | $ 1,764,464 | $ 1,699,485
Ratio | 7.34 | 7.92

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- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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