Annual report [Section 13 and 15(d), not S-K Item 405]

Derivative Instruments and Hedging Activities - Narrative (Details)

v3.25.4
Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount $ 17,967,167,000 $ 13,025,485,000 $ 1,923,988,000  
Total available-for-sale securities 6,514,471,000 7,371,711,000    
Mortgage servicing rights, at fair value 2,421,910,000 2,994,271,000 3,052,016,000 $ 2,984,937,000
Derivative assets, at fair value 87,549,000 10,114,000    
Derivative liabilities, at fair value $ 4,254,000 24,897,000    
Warehouse Lines of Credit        
Derivative Instruments, Gain (Loss) [Line Items]        
Weighted average remaining maturities 60 days      
Interest-Only-Strip        
Derivative Instruments, Gain (Loss) [Line Items]        
Total available-for-sale securities $ 9,000,000.0 16,500,000    
Interest Rate Contract        
Derivative Instruments, Gain (Loss) [Line Items]        
Net interest income on interest rate swaps 24,700,000 58,500,000 21,400,000  
Average notional amount 17,100,000,000 14,100,000,000 8,000,000,000.0  
Interest rate lock commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount 38,238,000 25,879,000 0  
Notional 49,600,000 18,300,000    
Net carrying value $ 900,000 100,000    
Interest rate lock commitments | Minimum        
Derivative Instruments, Gain (Loss) [Line Items]        
Funding or cancellation or expiration of lock commitment 30 days      
Interest rate lock commitments | Maximum        
Derivative Instruments, Gain (Loss) [Line Items]        
Funding or cancellation or expiration of lock commitment 90 days      
Pull-through rate        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional $ 37,700,000 15,500,000    
Forward mortgage loan sale commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount 7,437,000 25,900,000 $ 0  
Notional 0 20,400,000    
Net carrying value   200,000    
TBAs (pipeline)        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional   $ 0    
Net carrying value 125,000      
TBAs (pipeline) | Sale contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional $ 35,000,000.0