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Employee Benefit Plan (Tables)
9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Schedule of components of net periodic benefit cost
Components of Net Periodic Benefit Cost
Pension Benefits
Three Months Ended
Life and Health
Three Months Ended
SERP Benefits
Three Months Ended
(In thousands)9/30/20209/30/20199/30/20209/30/199/30/20209/30/2019
Service cost$0 $$43 $40 $54 $38 
Interest cost593 734 61 72 228 228 
Expected return on plan assets(1,354)(1,233)0 0 
Amortization of net retirement plan actuarial loss353 333 39 200 78 
Amortization of net retirement plan prior service (credit) cost(2)(3)(15)(15)71 22 
Net periodic benefit (income) cost$(410)$(169)$128 $97 $553 $366 
Pension Benefits
Nine Months Ended
Life and Health
Nine Months Ended
SERP Benefits
Nine Months Ended
(In thousands)9/30/20209/30/20199/30/20209/30/20199/30/20209/30/2019
Service cost$0 $$129 $120 $161 $115 
Interest cost1,778 2,202 183 217 685 684 
Expected return on plan assets(4,062)(3,699)0 0 
Amortization of net retirement plan actuarial loss1,058 1,000 116 600 232 
Amortization of net retirement plan prior service cost (credit)(7)(8)(45)(46)214 65 
Net periodic benefit (income) cost$(1,233)$(505)$383 $291 $1,660 $1,096