v3.26.1
Loans and Allowance for Credit Losses - Types of Loans in Loan Portfolio (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Accounts Notes And Loans Receivable [Line Items]    
Loans held for sale $ 21,925 $ 14,155
Loans held for investment 23,832,909 20,486,415
Total loans, including Warehouse Purchase Program 25,287,986 21,805,368
Residential Mortgage Loans [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for sale 21,925 14,155
Warehouse Purchase Program [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 1,433,152 1,304,798
Total loans, including Warehouse Purchase Program 1,433,152 1,304,798
Commercial and Industrial [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 3,281,253 2,303,936
Total loans, including Warehouse Purchase Program 3,281,253 2,303,936
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 3,253,389 2,741,455
Total loans, including Warehouse Purchase Program 3,253,389 2,741,455
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 8,700,834 8,260,482
Total loans, including Warehouse Purchase Program [1] 8,722,759 8,274,637
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 7,126,213 5,776,397
Total loans, including Warehouse Purchase Program 7,126,213 5,776,397
Real Estate [Member] | Farmland [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 703,930 662,031
Agriculture [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 360,610 365,873
Consumer and Other [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Loans held for investment 406,680 376,241
Total loans, including Warehouse Purchase Program $ 406,680 $ 376,241
[1] Includes $21.9 million and $14.2 million of residential mortgage loans held for sale at March 31, 2026, and December 31, 2025, respectively.