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PENSION AND OTHER POSTRETIREMENT BENEFITS
 6 Months Ended
Jun. 30, 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 June 30,
 
Three Months Ended June 30,
 
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 June 30, 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 June 30, 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.
 
Pension Benefits
 
Other Benefits
 
Six Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Service cost
$
936

 
$
3,774

 
$
—

 
$
8

Interest cost
4,832

 
6,228

 
98

 
160

Expected return on plan assets
(7,224
)
 
(7,310
)
 
—

 
—

Amortization of prior service credit
—

 
—

 
(560
)
 
(144
)
Recognized actuarial loss (gain)
246

 
4,332

 
(124
)
 
184

Net periodic benefit (income) cost
$
(1,210
)
 
$
7,024

 
$
(586
)
 
$
208


For the six months ended June 30, 2016, $0.6 million of pension income was recognized in cost of sales and $0.6 million was recognized in selling, general, and administrative expenses. For the six months ended June 30, 2015, $4.0 million of pension expense was incurred in cost of sales and $3.0 million was incurred in selling, general, and administrative expenses.
During 2016, the Company expects to contribute $8.0 million and $2.0 million in discretionary contributions to the union and nonunion pension plans, respectively.