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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2021
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)6/30/20216/30/20206/30/20216/30/20206/30/20216/30/2020
Service cost$0 $$42 $45 $55 $61 
Interest cost327 545 36 59 147 217 
Expected return on plan assets(1,411)(1,352)0 0 
Amortization of net retirement plan actuarial loss397 355 82 52 233 175 
Amortization of net retirement plan prior service (credit) cost0 (2)(15)(15)70 71 
Net periodic benefit (income) cost$(687)$(454)$145 $141 $505 $524 

Pension Benefits
Six Months Ended
Life and Health
Six Months Ended
SERP Benefits
Six Months Ended
(In thousands)6/30/20216/30/20206/30/20216/30/20206/30/20216/30/2020
Service cost$0 $$93 $86 $115 $107 
Interest cost814 1,185 90 122 346 457 
Expected return on plan assets(2,826)(2,708)0 0 
Amortization of net retirement plan actuarial loss780 705 156 77 540 400 
Amortization of net retirement plan prior service cost (credit)0 (5)(30)(30)141 143 
Net periodic benefit (income) cost$(1,232)$(823)$309 $255 $1,142 $1,107