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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]  
Net Periodic Cost

Net periodic cost related to the Company’s unfunded supplemental benefit plans includes the following components:

 

 

Three Months Ended

September 30,

 

 

Nine Months Ended

September 30,

 

(in thousands)

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Expense:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service costs

 

$

43

 

 

$

44

 

 

$

129

 

 

$

134

 

Interest costs

 

 

1,239

 

 

 

1,781

 

 

 

3,717

 

 

 

5,343

 

Amortization of net actuarial loss

 

 

1,690

 

 

 

1,321

 

 

 

5,070

 

 

 

3,961

 

Amortization of prior service credit

 

 

(326

)

 

 

(777

)

 

 

(978

)

 

 

(2,331

)

 

 

$

2,646

 

 

$

2,369

 

 

$

7,938

 

 

$

7,107