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OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
OTHER INCOME (EXPENSE) |  |  |  |
Income (Loss) from Equity Method Investments |  | $ 408 | $ 3,163 | $ 5,481
Defined Benefit Plan, Other (Cost) Credit | [1] | (1,575) | 2,787 | 502
Other Nonoperating Income (Expense) |  | 5,109 | 15,048 | 4,703
Total other income (expense) |  | $ 3,942 | $ 20,998 | $ 10,686
[1] | Other components of net periodic pension (cost) income includes pension settlements and curtailments. Refer to Note 12 to the consolidated financial statements for details.

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