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Retirement Benefits (Tables)
3 Months Ended
Mar. 31, 2020
Defined Benefit Pension Plan [Member]  
Net Periodic Benefit Cost For U.S. Employees

Pension Benefits

Three Months Ended

 

March 31,

(Dollars in thousands)

2020

 

2019

Service cost

$

4,011

 

$

2,276

Interest cost

 

2,483

 

 

2,930

Expected return on plan assets

 

(5,197)

 

 

(5,016)

Amortization of net (income) loss

 

1,213

 

 

1,601

FAS 88 settlement charge

 

-

 

 

104

Net periodic benefit cost

$

2,510

 

$

1,895

Post-Retirement Plan [Member]  
Net Periodic Benefit Cost For U.S. Employees

Other Benefits

Three Months Ended

 

March 31,

(Dollars in thousands)

2020

 

2019

Service cost

$

141

 

$

286

Interest cost

 

215

 

 

295

Amortization of prior service cost

 

(48)

 

 

(144)

Net periodic benefit cost

$

308

 

$

437