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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Effect of cash flow hedging and fair value (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Loans |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Income and expense line items presented in the consolidated statements of income | $ 38,412 | $ 27,940 | $ 109,889 | $ 75,192
Securities and other |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Income and expense line items presented in the consolidated statements of income | 6,723 | 5,145 | 18,478 | 13,178
Deposits |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Income and expense line items presented in the consolidated statements of income | 11,415 | 1,801 | 25,270 | 4,185
Borrowings |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Income and expense line items presented in the consolidated statements of income | 4,534 | 1,374 | 14,215 | 3,458
Non-interest Income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Income and expense line items presented in the consolidated statements of income | 8,815 | 8,823 | 26,979 | 27,093
Interest rate swap on wholesale funding | Cash flow hedges | Borrowings |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on cash flow hedges: | 816 | 140 | 2,225 | (1)
Interest rate swap on variable rate loans | Cash flow hedges | Loans |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on cash flow hedges: | (578) | (238) | (1,575) | (239)
Interest rate swap on securities | Fair Value Hedging | Securities and other |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on fair value hedges: | $ 369 | $ 155 | $ 985 | $ (48)

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