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Retirement Plans
 9 Months Ended
Sep. 30, 2017
Compensation and Retirement Disclosure [Abstract]  
Retirement Plans
Retirement Plans

The components of the net periodic expense for the Company’s pension plans, supplemental executive retirement plans ("SERP") and other postretirement benefit plans ("OPEB") are as follows (in thousands):

 
 
For the Three Months Ended
 
For the Nine Months Ended
 
 
September 30,
2017
 
October 1,
2016
 
September 30,
2017
 
October 1,
2016
Service cost
 
$
1

 
$
—

 
$
1

 
$
1

Interest cost
 
3,305

 
3,555

 
9,847

 
10,645

Expected return on plan assets
 
(4,635
)
 
(4,775
)
 
(13,907
)
 
(14,326
)
Net amortization and deferral
 
2

 
1

 
4

 
3

Recognized net actuarial loss
 
2,630

 
2,507

 
7,854

 
7,467

Net periodic expense
 
$
1,303

 
$
1,288

 
$
3,799

 
$
3,790



Interest cost on the projected benefit obligation includes $0.2 million related to the Company’s SERP and OPEB plans in each of the three months ended September 30, 2017, and October 1, 2016, and $0.5 million for each of the nine months ended September 30, 2017, and October 1, 2016.

For the nine months ended September 30, 2017, the Company made total contributions of $7.0 million to its pension, SERP and OPEB plans. The Company expects to contribute approximately $2.3 million to its pension, SERP and OPEB plans, for the remainder of 2017.