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Defined Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2017
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of Net Periodic Benefit Costs

The components of net periodic benefit costs from these defined benefit plans are as follows:

 

 

Three Months Ended June 30,

 

(Dollars in thousands)

Pension Benefits

 

 

Other Benefits

 

 

2017

 

 

2016

 

 

2017

 

 

2016

 

Service cost

$

9

 

 

$

8

 

 

$

1

 

 

$

1

 

Interest cost

 

11

 

 

 

11

 

 

 

5

 

 

 

5

 

Amortization (accretion) of prior service cost

 

4

 

 

 

8

 

 

 

(6

)

 

 

6

 

Net periodic benefit cost

$

24

 

 

$

27

 

 

$

-

 

 

$

12

 

 

 

Six Months Ended June 30,

 

(Dollars in thousands)

Pension Benefits

 

 

Other Benefits

 

 

2017

 

 

2016

 

 

2017

 

 

2016

 

Service cost

$

18

 

 

$

17

 

 

$

2

 

 

$

2

 

Interest cost

 

22

 

 

 

23

 

 

 

10

 

 

 

11

 

Amortization (accretion) of prior service cost

 

7

 

 

 

25

 

 

 

(12

)

 

 

91

 

Net periodic benefit cost

$

47

 

 

$

65

 

 

$

-

 

 

$

104