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Retirement Plans and Other Benefits - Amounts Recognized on the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Amounts recognized on the Consolidated Balance Sheets |  |
Noncurrent asset | $ 90,570 | $ 46,906
Pension Benefits |  |
Amounts recognized on the Consolidated Balance Sheets |  |
Noncurrent asset | 0 | 0
Current liability | (14,578) | (13,980)
Noncurrent liability | (280,185) | (443,170)
Net amount recognized | (294,763) | (457,150)
Other Benefits |  |
Amounts recognized on the Consolidated Balance Sheets |  |
Noncurrent asset | 90,570 | 46,906
Current liability | 0 | 0
Noncurrent liability | 0 | 0
Net amount recognized | $ 90,570 | $ 46,906

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