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PENSION AND OTHER POST-EMPLOYMENT BENEFITS
 3 Months Ended
Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
PENSION AND OTHER POST-EMPLOYMENT BENEFITS
PENSION AND OTHER POST-EMPLOYMENT BENEFITS
The following tables set forth the components of the net periodic benefit income for the Company’s pension and other post-employment benefit plans (in thousands):
 
Pension Benefits
 
Other Benefits
 
Three Months Ended March 31,
 
Three Months Ended March 31,
 
2018
 
2017
 
2018
 
2017
Service cost
$
235

 
$
175

 
$
—

 
$
—

Interest cost
2,504

 
2,390

 
30

 
43

Expected return on plan assets
(4,606
)
 
(4,615
)
 
—

 
—

Amortization of prior service credit
—

 
—

 
(182
)
 
(371
)
Recognized actuarial loss (gain)
366

 
154

 
(18
)
 
1

Net periodic benefit income
$
(1,501
)
 
$
(1,896
)
 
$
(170
)
 
$
(327
)