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Retirement Benefits
6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Retirement Benefits

15. RETIREMENT BENEFITS

 

The Company maintains both qualified and non-qualified defined benefit pension plans for its U.S. employees employed prior to April 1, 2010. Generally, the Company computes the benefits based on average earnings over a period prescribed by the plans and credited length of service. The Company’s non-qualified defined benefit pension plan provided compensating pension benefits for participants whose benefits have been curtailed under the qualified plan due to Internal Revenue Code limitations. Effective January 1, 2018, participants of the Company’s non-qualified defined benefit pension plan may no longer accrue additional service benefits.

 

Net periodic benefit cost for U.S. employees included the following components for the periods indicated:

Pension Benefits

Three Months Ended

 

Six Months Ended

 

June 30,

 

June 30,

(Dollars in thousands)

2021

 

2020

 

2021

 

2020

Service cost

$

2,738

 

$

2,041

 

$

5,476

 

$

6,052

Interest cost

 

1,999

 

 

2,563

 

 

3,998

 

 

5,046

Expected return on plan assets

 

(5,580)

 

 

(5,197)

 

 

(11,161)

 

 

(10,394)

Amortization of net (income) loss

 

2,731

 

 

2,462

 

 

5,461

 

 

3,675

Net periodic benefit cost

$

1,888

 

$

1,869

 

$

3,774

 

$

4,379

Other Benefits

Three Months Ended

 

Six Months Ended

 

June 30,

 

June 30,

(Dollars in thousands)

2021

 

2020

 

2021

 

2020

Service cost

$

281

 

$

311

 

$

564

 

$

452

Interest cost

 

181

 

 

215

 

 

362

 

 

429

Amortization of prior service cost

 

(144)

 

 

(176)

 

 

(289)

 

 

(224)

Net periodic benefit cost

$

318

 

$

350

 

$

637

 

$

657

The service cost component of net periodic benefit costs is included within other underwriting expenses on the consolidated statement of operations and comprehensive income (loss). In accordance with ASU 2017-07, other staff compensation costs are also primarily recorded within this line item.

 

The Company did not make any contributions to the qualified pension benefit plan for the three and six months ended June 30, 2021 and 2020, respectively.