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PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2018
Pension Plan  
PENSION PLANS  
Schedule of components of net periodic benefit cost
The following table sets forth the components of net periodic benefit cost for the Pension Plan for the periods indicated:
 
 
Three Months Ended
March 31,
(dollars in thousands)
2018
 
2017
Interest cost
$
231

 
$
229

Expected return on plan assets
(259
)
 
(264
)
Amortization of net actuarial loss
298

 
296

Net periodic cost
$
270

 
$
261

SERPs  
PENSION PLANS  
Schedule of components of net periodic benefit cost
The following table sets forth the components of net periodic benefit cost for the SERPs for the periods indicated:
 
 
Three Months Ended
March 31,
(dollars in thousands)
2018
 
2017
Interest cost
$
97

 
$
115

Amortization of net actuarial loss
43

 
26

Amortization of net transition obligation
5

 
4

Amortization of prior service cost
5

 
4

Net periodic cost
$
150

 
$
149