v3.26.1
FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Cash and due from banks $ 86,665 $ 84,158
Interest-bearing deposits 529,432 196,300
Investment securities held to maturity, net of allowance for credit losses 1,653,943 1,718,287
Loans held for sale 77,880 20,079
Net loans 15,352,936 13,498,304
Federal Home Loan Bank stock 70,818 47,245
Interest receivable 101,927 93,374
Liabilities:    
Deposits 16,745,734 15,295,040
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 103,333 103,747
Federal Home Loan Bank advances 1,411,741 803,396
Subordinated debentures and other borrowings 79,438 53,982
Interest payable 17,491 18,235
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Cash and due from banks 86,665 84,158
Interest-bearing deposits 529,432 196,300
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 14,614,077 13,252,258
Borrowings:    
Federal funds purchased   0
Securities sold under repurchase agreements 0 0
Federal Home Loan Bank advances 0 0
Subordinated 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 1,650,805 1,713,872
Loans held for sale 77,880 20,079
Net loans 0 0
Federal Home Loan Bank stock 70,818 47,245
Interest receivable 101,927 93,374
Liabilities:    
Deposits 2,131,657 2,042,782
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 103,333 103,747
Federal Home Loan Bank advances 1,411,741 803,396
Subordinated debentures and other borrowings 79,438 53,982
Interest payable 17,491 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 3,138 4,415
Loans held for sale 0 0
Net loans 15,352,936 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 debentures and other borrowings 0 0
Interest payable 0 0
Carrying Amount    
Assets:    
Cash and due from banks 86,665 84,158
Interest-bearing deposits 529,432 196,300
Investment securities held to maturity, net of allowance for credit losses 1,907,684 1,971,539
Loans held for sale 77,880 20,079
Net loans 15,289,122 13,596,110
Federal Home Loan Bank stock 70,818 47,245
Interest receivable 101,927 93,374
Liabilities:    
Deposits 16,753,381 15,294,855
Borrowings:    
Federal funds purchased   40,000
Securities sold under repurchase agreements 103,340 103,755
Federal Home Loan Bank advances 1,414,059 798,549
Subordinated debentures and other borrowings 86,350 57,630
Interest payable $ 17,491 $ 18,235