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EMPLOYEE BENEFIT PLANS - Funded Status of Pension Plan (Details) - Pension Plans - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Amounts recognized in the Consolidated Balance Sheets |  |
Noncurrent asset | $ 63,857 | $ 72,320
Current liability | (3,776) | (3,863)
Noncurrent liability | (265,178) | (413,829)
Net amount recognized | (205,097) | (345,372)
Amounts recognized in accumulated other comprehensive loss (pre-tax) |  |
Prior service cost | 3,816 | 13,798
Net actuarial loss | 855,300 | 869,907
Net amount recognized | $ 859,116 | $ 883,705

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