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DERIVATIVE INSTRUMENTS - Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
INTEREST RATE CAP AGREEMENTS |  |
Total consolidated interest expense | $ 4,541 | $ 6,945
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20: |  |
Interest contracts: Premium excluded and recognized on an amortized basis | $ 69 |

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