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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2021
Pension [Member]  
Components of Net Periodic Pension Plan Cost

Pension Plan

Three Months Ended

March 31,

(in thousands)

2021

2020

Service cost

$

39

$

56

Interest cost

356

407

Expected return on assets

(893)

(887)

Amortization of net actuarial loss

372

358

Net pension credit included in employee benefits
  and other expense

$

(126)

$

(66)

SERP [Member]  
Components of Net Periodic Pension Plan Cost

Defined Benefit SERP

Three Months Ended

March 31,

(in thousands)

2021

2020

Service cost

$

35

$

31

Interest cost

60

67

Amortization of recognized loss

75

47

Amortization of prior service cost

(1)

(1)

Net Defined Benefit SERP expense included in
  employee benefits and other expense

$

169

$

144