v3.26.3
FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Assets:    
Cash and due from banks $ 86,594 $ 84,158
Interest-bearing deposits 262,503 196,300
Investment securities held to maturity, net of allowance for credit losses 1,495,477 1,718,287
Loans held for sale 91,694 20,079
Net loans 15,366,594 13,498,304
Federal Home Loan Bank stock 70,794 47,245
Interest receivable 99,280 93,374
Liabilities:    
Deposits 16,915,721 15,295,040
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 99,631 103,747
Federal Home Loan Bank advances 897,248 803,396
Subordinated notes, debentures and other borrowings 174,568 53,982
Interest payable 17,095 18,235
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and due from banks 86,594 84,158
Interest-bearing deposits 262,503 196,300
Investment securities held to maturity, net of allowance for credit losses 0 0
Loans held for sale 0 0
Net loans 0 0
Federal Home Loan Bank stock 0 0
Interest receivable 0 0
Liabilities:    
Deposits 14,682,831 13,252,258
Borrowings:    
Federal funds purchased   0
Securities sold under repurchase agreements 0 0
Federal Home Loan Bank advances 0 0
Subordinated notes, debentures and other borrowings 0 0
Interest payable 0 0
Significant Other Observable Inputs (Level 2)    
Assets:    
Cash and due from banks 0 0
Interest-bearing deposits 0 0
Investment securities held to maturity, net of allowance for credit losses 1,493,008 1,713,872
Loans held for sale 91,694 20,079
Net loans 0 0
Federal Home Loan Bank stock 70,794 47,245
Interest receivable 99,280 93,374
Liabilities:    
Deposits 2,232,890 2,042,782
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 99,631 103,747
Federal Home Loan Bank advances 897,248 803,396
Subordinated notes, debentures and other borrowings 174,568 53,982
Interest payable 17,095 18,235
Significant Unobservable Inputs (Level 3)    
Assets:    
Cash and due from banks 0 0
Interest-bearing deposits 0 0
Investment securities held to maturity, net of allowance for credit losses 2,469 4,415
Loans held for sale 0 0
Net loans 15,366,594 13,498,304
Federal Home Loan Bank stock 0 0
Interest receivable 0 0
Liabilities:    
Deposits 0 0
Borrowings:    
Federal funds purchased   0
Securities sold under repurchase agreements 0 0
Federal Home Loan Bank advances 0 0
Subordinated notes, debentures and other borrowings 0 0
Interest payable 0 0
Carrying Amount    
Assets:    
Cash and due from banks 86,594 84,158
Interest-bearing deposits 262,503 196,300
Investment securities held to maturity, net of allowance for credit losses 1,872,951 1,971,539
Loans held for sale 87,300 20,079
Net loans 15,385,448 13,596,110
Federal Home Loan Bank stock 70,794 47,245
Interest receivable 99,280 93,374
Liabilities:    
Deposits 16,928,932 15,294,855
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 99,638 103,755
Federal Home Loan Bank advances 903,941 798,549
Subordinated notes, debentures and other borrowings 184,505 57,630
Interest payable $ 17,095 $ 18,235