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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