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FAIR VALUE (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets (liabilities) |  |
Other long-term assets | $ 4,026 | $ 4,835
Recurring basis | Level 1 |  |
Assets (liabilities) |  |
Pension plan assets | 5,002 | 6,099
Other long-term assets | 3,884 | 4,690
Recurring basis | Level 2 |  |
Assets (liabilities) |  |
Interest rate swaps | $ (1,795) | $ (363)

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