Regulatory Capital Requirements - Capital Conservation Buffer (Details)	Sep. 30, 2024	Dec. 31, 2023
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Effective CET1 capital to risk-weighted assets (as a percent)	0.1303	0.1239
Effective Tier 1 capital to risk-weighted assets (as a percent)	0.1303	0.1239
Effective total capital to risk-weighted assets (as a percent)	0.1425	0.1357
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

Minimum capital conservation buffer percentage required to avoid restriction on payout amount of eligible retained income as defined by regulatory framework.

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

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Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework.

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Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
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-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework.

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