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Other Noncurrent Liabilities (Tables)
6 Months Ended
Jun. 30, 2018
Payables and Accruals [Abstract]  
Schedule of Other Noncurrent Liabilities
Other noncurrent liabilities include the following:
 
June 30,
2018
 
June 30,
2017
 
December 31,
2017
 
(In thousands)
Benefit plan liabilities
$
179,473

 
$
206,200

 
$
168,539

Noncurrent tax liabilities
122,425

 
96,083

 
124,330

Other
141,951

 
150,001

 
191,257

 
$
443,849

 
$
452,284

 
$
484,126