XML 45 R31.htm IDEA: XBRL DOCUMENT v3.19.1
Retirement Plans and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost (Income)
Components of net periodic benefit cost (income) were as follows: 
 
Three Months Ended March 31,
 
2019
 
2018
 
2019
 
2018
(Dollars in thousands)
Retirement Plans
 
Other Post Retirement
Benefits
Service cost
$
109

 
$
140

 
$
17

 
$
22

Interest cost
476

 
441

 
23

 
23

Expected return on plan assets
(771
)
 
(796
)
 
—

 
—

Amortization of net actuarial loss
294

 
280

 
—

 
1

Accretion of prior service cost
(45
)
 
(71
)
 
—

 
—

Net periodic benefit cost (income)
$
63

 
$
(6
)
 
$
40

 
$
46