v3.26.3
Borrowings - Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Subordinated Borrowing [Line Items]    
Subordinated Borrowing, Interest Rate 4.22% 4.55%
Subordinated Debt $ 39,253 $ 0
Customer repurchase agreements $ 571,884 $ 490,601
Weighted average interest rates 2.12% 1.72%
Maturities of Subordinated Debt $ 150,000  
carrying value of the subordinated notes 39,300  
Federal Home Loan Bank Advances [Member]    
Subordinated Borrowing [Line Items]    
Other Loans Payable Long Term 540,000 $ 500,000
Loans pledged as collaterals 7,600,000 6,470,000
Investment securities with carrying value 5,300,000 3,350,000
Borrowing Capacity 6,770,000 5,780,000
Available Capacity 6,230,000 5,280,000
Unsecured Borrowed Fund 305,000 $ 305,000
Federal Home Loan Bank Advances May Two Thousand Twenty Six [Member]    
Subordinated Borrowing [Line Items]    
Borrowed funds cost percentage   4.73%
Maturities of Subordinated Debt   $ 300,000
Federal Home Loan Bank Advances May Two Thousand Twenty Seven [Member]    
Subordinated Borrowing [Line Items]    
Borrowings $ 200,000  
Borrowed funds cost percentage 4.27% 4.27%
Maturities of Subordinated Debt   $ 200,000
Federal Home Loan Bank Advances October Two Thousand Twenty Seven [Member]    
Subordinated Borrowing [Line Items]    
Borrowings $ 40,000  
Borrowed funds cost percentage 4.36%  
Subordinated Debt [Member]    
Subordinated Borrowing [Line Items]    
Subordinated Borrowing, Interest Rate 5.00%  
Notes Payable $ 40,000