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FAIR VALUE MEASUREMENTS - Schedule of Estimated Non-recurring Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financial Assets |  |
Trading securities | $ 5,600 | $ 6,100
Equity securities | 13,278 | 13,029
Securities available for sale, at fair value | 661,740 | 1,022,285
Securities held to maturity | 451,194 | 476,228
Carrying Amount |  |
Financial Assets |  |
Cash and cash equivalents | 569,967 | 1,203,244
Trading securities | 5,560 | 6,142
Equity securities | 13,278 | 13,029
Securities available for sale, at fair value | 661,740 | 1,022,285
Securities held to maturity | 512,277 | 543,351
Federal Home Loan Bank stock | 30,685 | 22,689
Net loans | 9,100,275 | 8,934,329
Loans held for sale | 50,634 | 2,237
Accrued interest receivable | 49,804 | 53,096
Derivative assets | 45,007 | 45,668
Assets held for sale | 6,930 |
Financial Liabilities |  |
Total deposits | 9,577,489 | 10,633,384
Short-term debt | 353,500 | 260,000
Long-term Federal Home Loan Bank advances and other | 232,042 | 125,223
Subordinated borrowings | 121,549 | 121,363
Accrued interest payable | 11,937 | 13,766
Derivative liabilities | 63,678 | 75,957
Liabilities held for sale | 0 |
Fair Value |  |
Financial Assets |  |
Cash and cash equivalents | 569,967 | 1,203,244
Trading securities | 5,560 | 6,142
Equity securities | 13,278 | 13,029
Securities available for sale, at fair value | 661,740 | 1,022,285
Securities held to maturity | 451,194 | 476,228
Net loans | 9,024,531 | 8,768,108
Loans held for sale | 50,634 | 2,237
Accrued interest receivable | 49,804 | 53,096
Derivative assets | 45,007 | 45,668
Assets held for sale | 6,930 |
Financial Liabilities |  |
Total deposits | 9,572,152 | 10,615,655
Short-term debt | 353,982 | 260,035
Long-term Federal Home Loan Bank advances and other | 230,387 | 123,747
Subordinated borrowings | 106,519 | 98,138
Accrued interest payable | 11,937 | 13,766
Derivative liabilities | 63,678 | 75,957
Liabilities held for sale | 0 |
Level 1 |  |
Financial Assets |  |
Cash and cash equivalents | 569,967 | 1,203,244
Trading securities | 0 | 0
Equity securities | 13,278 | 13,029
Securities available for sale, at fair value | 6,907 | 7,981
Securities held to maturity | 0 | 0
Net loans | 0 | 0
Loans held for sale | 0 | 0
Accrued interest receivable | 0 | 0
Derivative assets | 0 | 0
Assets held for sale | 0 |
Financial Liabilities |  |
Total deposits | 0 | 0
Short-term debt | 0 | 0
Long-term Federal Home Loan Bank advances and other | 0 | 0
Subordinated borrowings | 0 | 0
Accrued interest payable | 0 | 0
Derivative liabilities | 0 | 0
Liabilities held for sale | 0 |
Level 2 |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Trading securities | 0 | 0
Equity securities | 0 | 0
Securities available for sale, at fair value | 650,941 | 1,010,381
Securities held to maturity | 449,986 | 474,742
Net loans | 0 | 0
Loans held for sale | 6,003 | 2,237
Accrued interest receivable | 49,804 | 53,096
Derivative assets | 44,790 | 45,613
Assets held for sale | 6,930 |
Financial Liabilities |  |
Total deposits | 9,572,152 | 10,615,655
Short-term debt | 353,982 | 260,035
Long-term Federal Home Loan Bank advances and other | 230,387 | 123,747
Subordinated borrowings | 106,519 | 98,138
Accrued interest payable | 11,937 | 13,766
Derivative liabilities | 63,678 | 75,957
Liabilities held for sale | 0 |
Level 3 |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Trading securities | 5,560 | 6,142
Equity securities | 0 | 0
Securities available for sale, at fair value | 3,892 | 3,923
Securities held to maturity | 1,208 | 1,486
Net loans | 9,024,531 | 8,768,108
Loans held for sale | 44,631 | 0
Accrued interest receivable | 0 | 0
Derivative assets | 217 | 55
Assets held for sale | 0 |
Financial Liabilities |  |
Total deposits | 0 | 0
Short-term debt | 0 | 0
Long-term Federal Home Loan Bank advances and other | 0 | 0
Subordinated borrowings | 0 | 0
Accrued interest payable | 0 | 0
Derivative liabilities | 0 | $ 0
Liabilities held for sale | $ 0 |

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