Quarterly report [Sections 13 or 15(d)]

Derivative Instruments and Hedging Activities - Narrative (Details)

v3.25.1
Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount $ 20,370,357 $ 11,524,816    
Total available-for-sale securities 8,606,870   $ 7,371,711  
Mortgage servicing rights, at fair value $ 2,959,773 3,084,879 2,994,271 $ 3,052,016
Weighted average remaining maturities 60 days      
Derivative assets, at fair value $ 27,550   10,114  
Derivative liabilities, at fair value (3,097)   (24,897)  
Interest-Only-Strip        
Derivative Instruments, Gain (Loss) [Line Items]        
Total available-for-sale securities 16,900   16,500  
Interest Rate Contract        
Derivative Instruments, Gain (Loss) [Line Items]        
Net interest expense (income) on interest rate swaps and caps 6,000 14,300    
Average notional amount 20,400,000 15,100,000    
Interest rate lock commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount 28,902 0    
Notional 38,800   18,300  
Fair Value $ 500   100  
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      
Forward mortgage loan sale commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Average notional amount $ 25,184 $ 0    
Notional 18,900   20,400  
Fair Value $ (41)   $ 200