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PENSION AND OTHER POSTRETIREMENT BENEFITS
 3 Months Ended
Mar. 31, 2016
Pension and Other Postretirement Benefit Expense [Abstract]  
PENSION AND OTHER POSTRETIREMENT BENEFITS
PENSION AND OTHER POSTRETIREMENT BENEFITS
The following table sets forth the components of the net periodic benefit cost for the Company's pension and other postretirement benefit plans (in thousands):
 
Pension Benefits
 
Other Benefits
 
Three Months Ended March 31,
 
Three Months Ended March 31,
 
2016
 
2015
 
2016
 
2015
Service cost
$
468

 
$
1,887

 
$
—

 
$
4

Interest cost
2,416

 
3,114

 
49

 
80

Expected return on plan assets
(3,612
)
 
(3,655
)
 
—

 
—

Amortization of prior service credit
—

 
—

 
(280
)
 
(72
)
Recognized actuarial loss (gain)
123

 
2,166

 
(62
)
 
92

Net periodic benefit (income) cost
$
(605
)
 
$
3,512

 
$
(293
)
 
$
104


For the three months ended March 31, 2016, $0.3 million of pension income was recognized in cost of sales and $0.3 million was recognized in selling, general, and administrative expenses. For the three months ended March 31, 2015, $2.0 million of pension expense was incurred in cost of sales and $1.5 million was incurred in selling, general, and administrative expenses.