v3.25.2
Fair Value - Financial Assets and Liabilities Measured at Fair Value Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale $ 1,782,092 $ 1,692,534    
Loans held for sale (LHFS) 219,649 200,307    
Mortgage servicing rights (MSR) 132,702 139,317 $ 136,658 $ 131,870
U.S. Treasury Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 215,679 202,669    
U.S. Government Agency Obligations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 65,800 38,807    
Recurring Basis [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 1,782,092 1,692,534    
Loans held for sale (LHFS) 219,649 200,307    
Mortgage servicing rights (MSR) 132,702 139,317    
Other assets - derivatives 22,985 15,397    
Other liabilities - derivatives 23,233 $ 41,355    
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other Assets    
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other Liabilities    
Recurring Basis [Member] | U.S. Treasury Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 215,679 $ 202,669    
Recurring Basis [Member] | U.S. Government Agency Obligations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 65,800 38,807    
Recurring Basis [Member] | Mortgage-Backed Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 1,500,613 1,451,058    
Level 1 [Member] | Recurring Basis [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 215,679 202,669    
Loans held for sale (LHFS) 0 0    
Mortgage servicing rights (MSR) 0 0    
Other assets - derivatives 3,674 18    
Other liabilities - derivatives 23 2,183    
Level 1 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 215,679 202,669    
Level 1 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Level 1 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Level 2 [Member] | Recurring Basis [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 1,566,413 1,489,865    
Loans held for sale (LHFS) 219,649 200,307    
Mortgage servicing rights (MSR) 0 0    
Other assets - derivatives 17,504 15,150    
Other liabilities - derivatives 23,210 39,172    
Level 2 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Level 2 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 65,800 38,807    
Level 2 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 1,500,613 1,451,058    
Level 3 [Member] | Recurring Basis [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Loans held for sale (LHFS) 0 0    
Mortgage servicing rights (MSR) 132,702 139,317    
Other assets - derivatives 1,807 229    
Other liabilities - derivatives 0 0    
Level 3 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Level 3 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale 0 0    
Level 3 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Securities available for sale $ 0 $ 0