XML 45 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1
Pension and other postretirement benefits (Tables)
 6 Months Ended
Jul. 01, 2018
Retirement Benefits [Abstract]  
Schedule of Net Benefit Cost of Pension and Postretirement Benefit Plans
Net pension and other postretirement benefits expense (income) consist of the following:
 
Pension
Three Months Ended
 
Other Postretirement Benefits
Three Months Ended
 
Pension
Six Months Ended
 
Other Postretirement Benefits
Six Months Ended
 
July 1, 2018
 
July 2, 2017
 
July 1, 2018
 
July 2, 2017
 
July 1, 2018
 
July 2, 2017
 
July 1, 2018
 
July 2, 2017
 
(Dollars in thousands)
Service cost
$
376

 
$
720

 
$
52

 
$
75

 
$
754

 
$
1,437

 
$
104

 
$
149

Interest cost
3,718

 
3,789

 
378

 
379

 
7,439

 
7,574

 
756

 
757

Expected return on plan assets
(7,415
)
 
(6,750
)
 
—

 
—

 
(14,836
)
 
(13,493
)
 
—

 
—

Net amortization and deferral
1,695

 
1,691

 
62

 
66

 
3,403

 
3,381

 
124

 
131

Net benefits expense (income)
$
(1,626
)
 
$
(550
)
 
$
492

 
$
520

 
$
(3,240
)
 
$
(1,101
)
 
$
984

 
$
1,037