XML 42 R32.htm IDEA: XBRL DOCUMENT v3.10.0.1
Employee Benefits (Tables)
 6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit
The following table summarizes the components of net periodic pension cost for the periods presented:
 
 
Three Months Ended June 30,
 
 
Six Months Ended June 30,
(dollars in thousands)
 
2018
 
 
2017
 
 
2018
 
 
2017
Components of Net Periodic Pension Cost
 

 
 

 
 

 
 

Interest cost on projected benefit obligation
 
$
967

 
 
$
1,025

 
 
$
1,934

 
 
$
2,050

Expected return on plan assets
 
(1,567
)
 
 
(1,582
)
 
 
(3,134
)
 
 
(3,164
)
Amortization of prior service credit
 
545

 
 
475

 
 
1,089

 
 
949

Net Periodic Pension Expense
 
$
(55
)
 
 
$
(82
)
 
 
$
(111
)
 
 
$
(165
)