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Other Noncurrent Liabilities
 6 Months Ended
Jun. 30, 2020
Payables and Accruals [Abstract]  
Other Noncurrent Liabilities Other Noncurrent Liabilities
Other noncurrent liabilities include the following:
June 30,
2020		June 30,
2019		December 31,
2019
 (In thousands)
Benefit plan liabilities$209,501  $184,220  $212,280  
Noncurrent income tax liabilities125,944  138,018  125,515