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Regulatory Matters - Additional Information (Detail) $ in Millions		12 Months Ended
	Mar. 27, 2020	Dec. 31, 2023 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		$ 328.9
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		0.1779
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		0.1415
Tier 1 leverage capital ratio		0.1244
Tier 1 risk-based capital ratio		0.1415
CECL | COVID-19
Regulatory Matters [Line Items]
Allowable percentage of bank holding companies impact	100.00%
Percentage of allowance for credit losses	25.00%

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

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