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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Defined Benefit Plan, Unfunded Plan          
Payment for Pension and Other Postretirement Benefits [Abstract]          
Defined Benefit Plan, Funded (Unfunded) Status of Plan $ 32,000   $ 32,000   $ 20,000
Defined Benefit Pension Plans          
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]          
Defined Benefit Plan, Service Cost 982 $ 1,260 2,946 $ 3,779  
Interest cost 2,705 2,328 8,114 6,984  
Expected return on plan assets (4,631) (5,219) (13,892) (15,657)  
Prior service cost (benefit) (17) 0 (51) 0  
Net loss (gain) 1,522 1,828 4,568 5,486  
Net periodic benefit cost 561 197 1,685 592  
Payment for Pension and Other Postretirement Benefits [Abstract]          
Contributions by Employer     0    
Estimated Future Employer Contributions in Current Fiscal Year 0   0    
Estimated Future Employer Contributions in Next Fiscal Year 0   0    
Supplemental Non-qualified Defined Benefit and Defined Contribution Plans          
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]          
Defined Benefit Plan, Service Cost (271) 235 (2,018) 1,948  
Interest cost 209 176 626 530  
Expected return on plan assets 0 0 0 0  
Prior service cost (benefit) 0 0 0 0  
Net loss (gain) 69 439 207 1,316  
Net periodic benefit cost 7 850 (1,185) 3,794  
Payment for Pension and Other Postretirement Benefits [Abstract]          
Contributions by Employer     1,617    
Estimated Future Employer Contributions in Current Fiscal Year 539   539    
Estimated Future Employer Contributions in Next Fiscal Year 2,224   2,224    
Other Postretirement Benefits Plan          
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]          
Defined Benefit Plan, Service Cost 492 560 1,476 1,678  
Interest cost 321 264 963 793  
Expected return on plan assets (31) (34) (93) (102)  
Prior service cost (benefit) (72) (108) (217) (326)  
Net loss (gain) 16 116 48 350  
Net periodic benefit cost 726 $ 798 2,177 $ 2,393  
Payment for Pension and Other Postretirement Benefits [Abstract]          
Contributions by Employer     3,828    
Estimated Future Employer Contributions in Current Fiscal Year 1,276   1,276    
Estimated Future Employer Contributions in Next Fiscal Year $ 5,062   $ 5,062