Quarterly report [Sections 13 or 15(d)]

Fair Value - Recurring Fair Value Measurements (Details)

v3.26.1
Fair Value - Recurring Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Assets:        
Available-for-sale securities $ 6,507,381 $ 6,514,471    
Mortgage servicing rights 2,380,983 2,421,910 $ 2,959,773 $ 2,994,271
Mortgage loans held-for-sale 18,536 13,630    
Derivative assets 71,213 87,549    
Total Assets 8,978,113 9,037,560    
Liabilities:        
Derivative liabilities 11,254 4,254    
Total Liabilities 11,254 4,254    
Level 1        
Assets:        
Available-for-sale securities 0 0    
Mortgage servicing rights 0 0    
Mortgage loans held-for-sale 0 0    
Derivative assets 6,065 18,365    
Total Assets 6,065 18,365    
Liabilities:        
Derivative liabilities 11,228 4,254    
Total Liabilities 11,228 4,254    
Level 2        
Assets:        
Available-for-sale securities 6,504,232 6,511,212    
Mortgage servicing rights 0 0    
Mortgage loans held-for-sale 18,536 13,630    
Derivative assets 64,352 68,303    
Total Assets 6,587,120 6,593,145    
Liabilities:        
Derivative liabilities 0 0    
Total Liabilities 0 0    
Level 3        
Assets:        
Available-for-sale securities 3,149 3,259    
Mortgage servicing rights 2,380,983 2,421,910    
Mortgage loans held-for-sale 0 0    
Derivative assets 796 881    
Total Assets 2,384,928 2,426,050    
Liabilities:        
Derivative liabilities 26 0    
Total Liabilities $ 26 $ 0