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EMPLOYEE BENEFIT PLANS (Tables)
9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
Components of net pension expense were as follows:
Three months ended September 30,Nine months ended September 30,
 2019201820192018
 (In thousands)
Pension Benefits
Company-administered plans:
Service cost$2,449  3,074  $8,264  9,370  
Interest cost21,301  19,425  64,165  58,275  
Expected return on plan assets(22,350) (25,187) (67,615) (76,086) 
Amortization of:
Net actuarial loss8,170  7,130  23,212  21,416  
Prior service cost167  145  533  434  
9,737  4,587  28,559  13,409  
Union-administered plans2,718  2,469  7,876  7,339  
Net pension expense$12,455  7,056  $36,435  20,748  
Company-administered plans:
U.S.$11,067  7,011  $33,199  21,033  
Non-U.S.(1,330) (2,424) (4,640) (7,624) 
9,737  4,587  28,559  13,409  
Union-administered plans2,718  2,469  7,876  7,339  
Net pension expense$12,455  7,056  $36,435  20,748