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Regulatory Matters - Additional Information (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($)
Regulated Operations [Abstract] |  |
Trust-preferred securities included in Tier 1 capital | $ 25.8 |
Additional dividends without obtaining prior approval from bank regulators declared and paid |  | $ 98.7
Minimum total risk based capital ratio |  | 0.80
Minimum Tier 1 risk based capital ratio |  | 0.60
Minimum common equity Tier 1 capital ratio |  | 0.45
Minimum leverage ratio for Highest rated institutions |  | 0.40
Well capitalized common equity Tier 1 capital ratio |  | 0.65
Well capitalized Tier 1 risk based capital ratio |  | 0.80
Well capitalized risk based capital ratio |  | 1.00
Well capitalized leverage ratio |  | 0.50
Capital Conservation Buffer rate |  | 0.25
Trust preferred securities redemption date | Jun. 15, 2021 |
Capital Conservation Buffer common equity Tier 1 capital ratio |  | 0.70
Capital Conservation Buffer Risk-Based Capital Ratio |  | 0.85
Capital Conservation Buffer Total Risk-Based Capital Ratio |  | 0.105
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum |  | 0.25

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- Definition Tier One Risk Based Capital Required For Capital Adequacy With Buffer To Risk Weighted Assets + References No definition available. + Details
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- Definition Trust preferred securities included in tier one capital. + References No definition available. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition Capital conservation buffer percentage calculated as Common Equity Tier 1 risk-based capital ratio after deduction of minimum Common Equity Tier 1 risk-based capital ratio 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 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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