XML 57 R46.htm IDEA: XBRL DOCUMENT v3.26.1
DEBT SECURITIES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2022
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]        
Debt securities, available-for-sale and held to maturity, accrued interest, after allowance for credit loss   $ 19,100   $ 20,200
Debt securities, available-for-sale, accrued interest, after allowance for credit loss   16,700   17,800
Debt securities, held-to-maturity, accrued interest, after allowance for credit loss   2,100   2,200
Trading securities   49,463   49,518
Trading gains (losses) recorded in servicing income   (533) $ 0  
Tax exempt interest income on available-for-sale securities   4,300 770  
Unrealized loss accreted to interest income   605 $ 627  
Debt securities, available-for-sale, transfer to held-to-maturity, gain (loss)   0    
Allowance for credit loss on debt securities, available-for-sale   0    
Allowance for credit loss on debt securities, held-to-maturity       0
Asset Pledged as Collateral | Federal Reserve Bank Advances | Equity Securities        
Debt Securities, Available-for-sale [Line Items]        
Public funds included in deposits, pledged collateral, amount   3,300,000    
Asset Pledged as Collateral | Public, Trust And Bankruptcy Deposits        
Debt Securities, Available-for-sale [Line Items]        
Public funds included in deposits, pledged collateral, amount   1,600,000    
Residential and Commercial Portfolio Segment | Residential and Commercial Mortgage        
Debt Securities, Available-for-sale [Line Items]        
Transfers of securities available-for-sale to held-to-maturity $ 1,700,000      
Residential and Commercial Portfolio Segment | Residential and Commercial Mortgage | Securities        
Debt Securities, Available-for-sale [Line Items]        
Other comprehensive income, amount remaining of debt securities available for sale transfer to held to maturity, before tax 23,500      
Other comprehensive income, amount remaining of debt securities available for sale transfer to held to maturity, net of deferred taxes $ 16,700      
US Treasury Notes Securities        
Debt Securities, Available-for-sale [Line Items]        
Trading securities   $ 49,500   $ 49,500