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FAIR VALUES OF FINANCIAL INSTRUMENTS - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Cash and due from banks | $ 112,649 | $ 122,594
Investment securities held to maturity | 1,870,374 | 1,907,865
Loans held for sale | 18,934 | 9,094
Total Fair Value |  |
Assets: |  |
Cash and due from banks | 112,649 | 122,594
Interest-bearing deposits | 436,080 | 126,061
Investment securities available for sale | 1,627,112 | 1,976,661
Investment securities held to maturity | 1,870,374 | 1,907,865
Loans held for sale | 18,934 | 9,094
Loans | 11,958,301 | 11,156,217
Federal Home Loan Bank stock | 41,769 | 38,525
Derivative assets | 79,379 | 93,036
Interest receivable | 97,664 | 85,070
Liabilities at December 31: |  |
Deposits | 14,811,957 | 14,356,953
Borrowings: |  |
Federal funds purchased |  | 171,560
Securities sold under repurchase agreements | 157,265 | 167,396
Federal Home Loan Bank advances | 707,377 | 615,211
Subordinated debentures and other borrowings | 149,995 | 122,102
Derivative liabilities | 79,008 | 92,770
Interest payable | 18,912 | 7,530
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Cash and due from banks | 112,649 | 122,594
Interest-bearing deposits | 436,080 | 126,061
Investment securities available for sale | 0 | 2,459
Investment securities held to maturity | 0 | 0
Loans held for sale | 0 | 0
Loans | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Derivative assets | 0 | 0
Interest receivable | 0 | 0
Liabilities at December 31: |  |
Deposits | 12,482,295 | 13,105,936
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
Derivative liabilities | 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 available for sale | 1,623,802 | 1,970,763
Investment securities held to maturity | 1,859,974 | 1,893,271
Loans held for sale | 18,934 | 9,094
Loans | 0 | 0
Federal Home Loan Bank stock | 41,769 | 38,525
Derivative assets | 79,379 | 93,036
Interest receivable | 97,664 | 85,070
Liabilities at December 31: |  |
Deposits | 2,329,662 | 1,251,017
Borrowings: |  |
Federal funds purchased |  | 171,560
Securities sold under repurchase agreements | 157,265 | 167,396
Federal Home Loan Bank advances | 707,377 | 615,211
Subordinated debentures and other borrowings | 149,995 | 122,102
Derivative liabilities | 79,008 | 92,770
Interest payable | 18,912 | 7,530
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Cash and due from banks | 0 | 0
Interest-bearing deposits | 0 | 0
Investment securities available for sale | 3,310 | 3,439
Investment securities held to maturity | 10,400 | 14,594
Loans held for sale | 0 | 0
Loans | 11,958,301 | 11,156,217
Federal Home Loan Bank stock | 0 | 0
Derivative assets | 0 | 0
Interest receivable | 0 | 0
Liabilities at December 31: |  |
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
Derivative liabilities | 0 | 0
Interest payable | 0 | 0
Carrying Amount |  |
Assets: |  |
Cash and due from banks | 112,649 | 122,594
Interest-bearing deposits | 436,080 | 126,061
Investment securities available for sale | 1,627,112 | 1,976,661
Investment securities held to maturity | 2,184,252 | 2,287,127
Loans held for sale | 18,934 | 9,094
Loans | 12,281,093 | 11,780,617
Federal Home Loan Bank stock | 41,769 | 38,525
Derivative assets | 79,379 | 93,036
Interest receivable | 97,664 | 85,070
Liabilities at December 31: |  |
Deposits | 14,821,453 | 14,382,745
Borrowings: |  |
Federal funds purchased |  | 171,560
Securities sold under repurchase agreements | 157,280 | 167,413
Federal Home Loan Bank advances | 712,852 | 823,674
Subordinated debentures and other borrowings | 158,644 | 151,298
Derivative liabilities | 79,008 | 92,770
Interest payable | $ 18,912 | $ 7,530

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