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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Table)
 9 Months Ended
Sep. 30, 2017
Pension Plans Defined Benefit [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Defined Benefit Plans Disclosures
The components of net periodic pension cost for the three and nine months ended September 30, 2017 and 2016 were as follows:

 
Three Months Ended
 
Nine Months Ended
(In thousands)
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Service cost
$
5,874

 
$
6,347

 
$
18,819

 
$
18,832

Interest cost
6,951

 
7,503

 
19,406

 
22,915

Expected return on plan assets
(13,549
)
 
(13,462
)
 
(40,144
)
 
(40,633
)
Amortization of prior service cost
(24
)
 
(11
)
 
(75
)
 
(34
)
Amortization of unrecognized actuarial loss
2,525

 
2,837

 
9,691

 
9,023

Net periodic benefit cost
$
1,777


$
3,214


$
7,697


$
10,103