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FAIR VALUE (Details) - Recurring basis - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Level 1 |  |
Assets (liabilities) |  |
Pension plan assets | $ 6,685 | $ 6,347
Deferred compensation plan assets | 4,365 | 5,386
Level 2 |  |
Assets (liabilities) |  |
Interest rate swaps | (961) | $ (1,889)
Foreign currency hedge contracts | $ (14) |

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