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DERIVATIVES AND HEDGING ACTIVITIES - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivative [Line Items] |  |
Liability for cash collateral received from counterparties | $ 7,600 | $ 0
Receivable for cash collateral paid to counterparties | 1,600 | 5,300
Notional amount of open interest rate swap agreements | 1,170,771 | 1,335,485
Interest rate swaps, back-to-back |  |
Derivative [Line Items] |  |
Notional amount of open interest rate swap agreements | $ 277,000 | $ 287,000

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