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Employee Benefit Plan (Tables)
6 Months Ended
Jun. 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)6/30/20206/30/20196/30/20206/30/196/30/20206/30/2019
Service cost$ $ $45  $30  $61  $39  
Interest cost545  723  59  72  217  228  
Expected return on plan assets(1,352) (1,232)     
Amortization of net retirement plan actuarial loss355  330  52   175  70  
Amortization of net retirement plan prior service (credit) cost(2) (3) (15) (15) 71  22  
Net periodic benefit (income) cost$(454) $(182) $141  $87  $524  $359  
Pension Benefits
Six Months Ended
Life and Health
Six Months Ended
SERP Benefits
Six Months Ended
(In thousands)6/30/20206/30/20196/30/20206/30/20196/30/20206/30/2019
Service cost$ $ $86  $80  $107  $77  
Interest cost1,185  1,468  122  145  457  456  
Expected return on plan assets(2,708) (2,466)     
Amortization of net retirement plan actuarial loss705  667  77   400  154  
Amortization of net retirement plan prior service cost (credit)(5) (5) (30) (31) 143  44  
Net periodic benefit (income) cost$(823) $(336) $255  $194  $1,107  $731