Quarterly report [Sections 13 or 15(d)]

Derivative Instruments and Hedging Activities - Narrative (Details)

v3.26.1
Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Derivative [Line Items]        
Average notional amount $ 13,662,520 $ 20,370,357    
Total available-for-sale securities 6,507,381   $ 6,514,471  
Mortgage servicing rights, at fair value 2,380,983 2,959,773 2,421,910 $ 2,994,271
Derivative assets, at fair value 71,213   87,549  
Derivative liabilities, at fair value $ 11,254   4,254  
Warehouse Lines of Credit        
Derivative [Line Items]        
Weighted average remaining maturities 60 days      
Interest-Only-Strip        
Derivative [Line Items]        
Total available-for-sale securities $ 8,700   9,000  
Interest Rate Contract        
Derivative [Line Items]        
Net interest income on interest rate swaps 1,700 6,000    
Average notional amount 13,300,000 20,400,000    
Interest rate lock commitments        
Derivative [Line Items]        
Average notional amount 69,956 28,902    
Notional 65,800   49,600  
Net carrying value $ 800   900  
Interest rate lock commitments | Minimum        
Derivative [Line Items]        
Funding or cancellation or expiration of lock commitment 30 days      
Interest rate lock commitments | Maximum        
Derivative [Line Items]        
Funding or cancellation or expiration of lock commitment 90 days      
Interest rate lock commitments, Pull-through adjusted        
Derivative [Line Items]        
Notional $ 57,000   37,700  
Forward mortgage loan sale commitments        
Derivative [Line Items]        
Average notional amount 0 $ 25,184    
Notional 0   0  
TBAs (pipeline)        
Derivative [Line Items]        
Net carrying value 600   (100)  
TBAs (pipeline) | Sale contracts        
Derivative [Line Items]        
Notional $ 54,000   $ 35,000