XML 96 R63.htm IDEA: XBRL DOCUMENT v3.22.4
Investment Securities - Additional Information (Details)
 12 Months Ended
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Summary of Investment Holdings [Line Items]      
Investment securities held to maturity $ 3,089,147,000 $ 0  
Fair value of securities transferred to held-for-maturity 3,000,000,000    
Unrealized loss 125,200,000    
Securities pledged to secure public and other funds, carrying value 6,100,000,000 2,700,000,000  
Transfers from available-for-sale to held-to-maturity (148,900,000)    
Allowance for credit losses for available-for-sale debt securities 0 $ 0  
Allowance for securities held-to-maturity $ (150,000)    
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other assets Other assets  
Accrued interest receivable $ 50,900,000 $ 35,500,000  
Number of securities in security portfolio | security 3,150    
Number of securities in unrealized loss position | security 2,803    
Equity securities, at fair value $ 52,507,000 13,211,000  
(Losses) gains on equity securities (4,900,000) 200,000 $ 1,400,000
Impairments on equity securities without readily determinable fair value 0 0 $ 100,000
Downward adjustments on equity securities without readily determinable fair value 0 0  
Other Assets      
Summary of Investment Holdings [Line Items]      
Equity securities without readily determinable fair value 396,800,000 $ 186,000,000  
Other Assets | Partnership Interest      
Summary of Investment Holdings [Line Items]      
Equity securities without readily determinable fair value 240,100,000    
Other Assets | Initiatives in Low-to-Moderate Income Neighborhoods      
Summary of Investment Holdings [Line Items]      
Equity securities without readily determinable fair value 156,800,000    
Indiana      
Summary of Investment Holdings [Line Items]      
Investment securities issued by states and political subdivisions, market value $ 628,600,000    
State and political subdivision investment, equity percentage 12.30%    
Percentage of municipal bonds rated A or better 99.70%    
Percentage of non rated local interest bonds 0.30%