v3.26.1
Fair Value Disclosures - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale $ 7,016,650 $ 6,372,463
Equity investments 53,898 48,200
Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans held for sale 27,751 54,119
Equity investments 53,898 48,200
Derivatives 7,122 7,969
Total assets 7,105,422 6,482,752
Derivatives 5,958 7,021
Total liabilities 5,958 7,021
U.S. agency debentures    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 55,580 132,456
U.S. agency debentures | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 6,997,928 6,349,320
Obligations of states and political subdivisions    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 14,312 16,644
Obligations of states and political subdivisions | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 14,312 16,644
Other securities | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 4,410 6,499
Level 1 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans held for sale 0 0
Equity investments 2,833 0
Derivatives 0 0
Total assets 1,205,855 929,305
Derivatives 0 0
Total liabilities 0 0
Level 1 | U.S. agency debentures | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 1,201,915 928,287
Level 1 | Obligations of states and political subdivisions | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 0 0
Level 1 | Other securities | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 1,106 1,018
Level 2 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans held for sale 27,751 54,119
Equity investments 39,477 36,690
Derivatives 7,122 7,969
Total assets 5,887,979 5,541,937
Derivatives 5,958 7,021
Total liabilities 5,958 7,021
Level 2 | U.S. agency debentures | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 5,796,013 5,421,033
Level 2 | Obligations of states and political subdivisions | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 14,312 16,644
Level 2 | Other securities | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 3,304 5,481
Level 3 | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Loans held for sale 0 0
Equity investments 11,588 11,510
Derivatives 0 0
Total assets 11,588 11,510
Derivatives 0 0
Total liabilities 0 0
Level 3 | U.S. agency debentures | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 0 0
Level 3 | Obligations of states and political subdivisions | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale 0 0
Level 3 | Other securities | Fair Value, Recurring    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Available for sale $ 0 $ 0