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PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS (Tables)
6 Months Ended
Jun. 30, 2016
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:
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
(dollars in thousands)
2016
 
2015
 
2016
 
2015
Interest cost
$
344

 
$
348

 
$
687

 
$
696

Expected return on plan assets
(439
)
 
(472
)
 
(878
)
 
(944
)
Amortization of net actuarial losses
354

 
393

 
708

 
786

Net periodic cost
$
259

 
$
269

 
$
517

 
$
538

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:
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
(dollars in thousands)
2016
 
2015
 
2016
 
2015
Interest cost
$
117

 
$
110

 
$
233

 
$
220

Amortization of net actuarial losses
12

 
28

 
25

 
55

Amortization of net transition obligation
4

 
4

 
8

 
8

Amortization of prior service cost
5

 
5

 
10

 
10

Net periodic cost
$
138

 
$
147

 
$
276

 
$
293