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Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Pension Benefits        
Components of net periodic benefit cost        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 496 407 1,489 1,221
Expected return on plan assets (1,471) (1,413) (4,414) (4,239)
Amortization of net retirement plan actuarial loss 304 390 913 1,170
Amortization of net retirement plan prior service (credit) cost 0 0 0 0
Net periodic benefit (income) cost (671) (616) (2,012) (1,848)
Life and Health        
Components of net periodic benefit cost        
Service cost 43 47 130 140
Interest cost 56 45 167 135
Expected return on plan assets 0 0 0 0
Amortization of net retirement plan actuarial loss 49 78 147 234
Amortization of net retirement plan prior service (credit) cost (15) (15) (46) (45)
Net periodic benefit (income) cost 133 155 398 464
SERP Benefits        
Components of net periodic benefit cost        
Service cost 19 58 58 173
Interest cost 203 173 610 519
Expected return on plan assets 0 0 0 0
Amortization of net retirement plan actuarial loss 212 270 635 810
Amortization of net retirement plan prior service (credit) cost 69 71 208 212
Net periodic benefit (income) cost $ 503 $ 572 $ 1,511 $ 1,714