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Employee Postretirement Benefits - Narrative (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Feb. 28, 2022
USD ($)
Dec. 31, 2021
USD ($)
year
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]        
Payment for pension benefits   $ 10,000 $ 11,200 $ 22,500
Defined contribution plan, cost   $ 6,500 5,300 $ 5,300
Subsequent Event        
Defined Benefit Plan Disclosure [Line Items]        
Payment for pension benefits $ 20,000      
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Age for compensation | year   65    
Age below which compensation is reduced | year   62    
Vesting period   5 years    
Investment redemption, notice period   95 days    
Accumulated benefit obligation   $ 378,300 $ 385,300  
Decrease in funded status of plan   $ 38,200    
Discount rate (as a percent)   3.03% 2.78%  
Other Postretirement Benefits Plan        
Defined Benefit Plan Disclosure [Line Items]        
Health insurance benefits, requisite age   55 years    
Health insurance benefits, requisite service period   10 years    
Discount rate (as a percent)   3.01% 2.75%  
Executive Survivor and Supplemental Retirement Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated benefit obligation   $ 46,800 $ 47,700  
Discount rate (as a percent)   2.93% 2.61%