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Components of Net Periodic Benefit Cost (Tables)
9 Months Ended
Sep. 30, 2017
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]  
Schedule of net pension cost of plans
Net pension cost for both plans included the following components:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
In thousands
 
2017
 
2016
 
2017
 
2016
Interest cost
 
$
1,837

 
$
1,950

 
$
5,511

 
$
5,851

Expected return on plan assets
 
(1,832
)
 
(2,061
)
 
(5,496
)
 
(6,183
)
Recognized actuarial loss
 
688

 
596

 
2,065

 
1,789

Net periodic benefit cost
 
$
693

 
$
485

 
$
2,080

 
$
1,457