Regulatory Matters - Additional Information (Detail) $ in Millions		12 Months Ended
Mar. 27, 2020	Dec. 31, 2024 USD ($)
Regulatory Matters [Line Items]
Percentage of retained earnings plus current year earnings to be paid as maximum dividend		75.00%
Requested dividend by the company from its subsidiary		$ 310.1
Basel III \| Criteria 1
Regulatory Matters [Line Items]
Tier 1 risk-based capital ratio		0.045
Tier 1 leverage capital ratio		0.04
Risk-based capital ratio		0.06
Risk-based capital ratio		0.08
Basel III \| Criteria 2
Regulatory Matters [Line Items]
Risk-based capital ratio		0.1874
Common equity Tier 1 risk-based capital ratio		0.065
Tier 1 leverage capital ratio		0.05
Tier 1 risk-based capital ratio		0.08
Total risk-based capital ratio		0.10
Common equity Tier 1 risk-based capital ratio		0.1511
Tier 1 leverage capital ratio		0.1305
Tier 1 risk-based capital ratio		0.1511
CECL \| COVID-19
Regulatory Matters [Line Items]
Allowable percentage of bank holding companies impact	100.00%
Percentage of allowance for credit losses	25.00%

Allowable percentage of bank holding companies impact.

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Dividends from Banking Subsidiary

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Percentage of total allowance for credit losses.

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- Definition

Percentage of retained net earnings plus current year earnings to be paid as maximum dividend.

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- Definition

Regulatory Matters [Line Items]

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- Definition

Risk-based capital ratio.

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- Definition

Tier one common equity risk based capital ratio.

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- Definition

Tier 1 leverage capital ratio,

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- Definition

Tier 1 risk-based capital ratio.

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- Definition

Tier one risk based common equity required to be well capitalized to risk weighted assets.

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- Definition

Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

+ 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

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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 minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

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Ratio of Tier 1 capital to average assets as defined by regulatory framework.

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Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

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

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