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DERIVATIVES AND HEDGING ACTIVITIES - Classification on Consolidated Statements of Financial Condition (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) DerivativeInstrument | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) DerivativeInstrument | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) DerivativeInstrument
Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Loan level derivative income | $ 445 | $ 1,544 | $ 2,796 | $ 5,201 |
Interest rate swaps related to FHLBNY advances | Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, assets | DerivativeInstrument | 4 |  | 4 |  |
Count, liabilities | DerivativeInstrument |  |  |  |  | 32
Notional amount, assets | $ 150,000 |  | $ 150,000 |  |
Notional amount, liabilities |  |  |  |  | $ 655,000
Fair value assets | $ 2,811 |  | $ 2,811 |  |
Fair value liabilities |  |  |  |  | $ 18,442
Loan Level Interest Rate Swaps with Borrower (Assets) | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, assets | DerivativeInstrument | 128 |  | 128 |  | 65
Notional amount, assets | $ 818,370 |  | $ 818,370 |  | $ 570,277
Fair value assets | $ 36,095 |  | $ 36,095 |  | $ 24,764
Loan Level Interest Rate Swaps with Borrower (Liabilities) | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, liabilities | DerivativeInstrument | 61 |  | 61 |  |
Notional amount, liabilities | $ 439,198 |  | $ 439,198 |  |
Fair value liabilities | (7,414) |  | (7,414) |  |
Posted collateral | $ 0 |  | $ 0 |  |
Loan level interest rate floors with borrower | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, liabilities | DerivativeInstrument | 47 |  | 47 |  | 41
Notional amount, liabilities | $ 405,685 |  | $ 405,685 |  | $ 364,643
Fair value liabilities | (4,072) |  | (4,072) |  | $ (5,832)
Loan level interest rate swaps with third-party counterparties (Liabilities) | Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Posted collateral | $ 0 |  | $ 0 |  |
Loan level interest rate swaps with third-party counterparties (Liabilities) | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, liabilities | DerivativeInstrument | 128 |  | 128 |  | 65
Notional amount, liabilities | $ 818,370 |  | $ 818,370 |  | $ 570,277
Fair value liabilities | (36,095) |  | (36,095) |  | $ (24,764)
Posted collateral | $ 23,500 |  | $ 23,500 |  |
Loan level interest rate swaps with third party counterparties (Assets) | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, assets | DerivativeInstrument | 61 |  | 61 |  |
Notional amount, assets | $ 439,198 |  | $ 439,198 |  |
Fair value assets | $ 7,414 |  | $ 7,414 |  |
Loan level interest rate floors with third-party counterparties | Not Designated as Hedging Instrument |  |  |  |  |
Cash Flow Hedges |  |  |  |  |
Count, assets | DerivativeInstrument | 47 |  | 47 |  | 41
Notional amount, assets | $ 405,685 |  | $ 405,685 |  | $ 364,643
Fair value assets | $ 4,072 |  | $ 4,072 |  | $ 5,832

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