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Regulatory Capital Requirements - Capital Conservation Buffer (Details) $ in Millions | Jan. 31, 2025 USD ($) | Dec. 31, 2024 | Dec. 31, 2023
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Effective CET1 capital to risk-weighted assets (as a percent) |  | 0.128 | 0.1239
Effective Tier 1 capital to risk-weighted assets (as a percent) |  | 0.128 | 0.1239
Effective total capital to risk-weighted assets (as a percent) |  | 0.1399 | 0.1357
Subsequent Event [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Stock repurchase program | $ 100.0 |  |
Banking Regulation, Standardized Approach |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Effective CET1 capital to risk-weighted assets (as a percent) |  | 0.07 |
Effective Tier 1 capital to risk-weighted assets (as a percent) |  | 0.085 |
Effective total capital to risk-weighted assets (as a percent) |  | 0.105 |
Capital requirements above regulatory rate (as a percent) |  | 0.025 |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Minimum capital conservation buffer percentage required to avoid restriction on payout amount of eligible retained income as defined by regulatory framework. + 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 + Details
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- Definition Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework. + 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 + Details
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- Definition Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + 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 + Details
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