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Employee Benefit Plans - Schedule of the Status of Funded Defined Benefit Pension Plan and Unfunded Accumulated Post-retirement Benefit Plans (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Employer contributions $ 600,000 $ 28,700,000 $ 7,400,000
Pension Benefits      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 0 227,200,000  
Service cost 0 1,400,000 1,200,000
Interest cost 0 700,000 5,100,000
Plan participants’ contributions 0 0  
Actuarial (gain) loss 0 (44,500,000)  
Benefits paid 0 (13,900,000)  
Settlement 0 (170,900,000)  
Benefit obligation at end of year 0 0 227,200,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 186,600,000  
Actual return on plan assets 0 (27,100,000)  
Employer contributions 0 25,300,000  
Participant contributions 0 0  
Benefits paid 0 (13,900,000)  
Settlement 0 (170,900,000)  
Fair value of plan assets at end of year 0 0 186,600,000
Funded Status (Recognized Liability) 0 0  
Other Post-retirement Benefits      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 8,100,000 12,600,000  
Service cost 100,000 100,000 100,000
Interest cost 400,000 400,000 300,000
Plan participants’ contributions 600,000 600,000  
Actuarial (gain) loss (100,000) (2,200,000)  
Benefits paid (1,200,000) (1,200,000)  
Settlement 0 (2,200,000)  
Benefit obligation at end of year 7,900,000 8,100,000 12,600,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 600,000 2,800,000  
Participant contributions 600,000 600,000  
Benefits paid (1,200,000) (1,200,000)  
Settlement 0 (2,200,000)  
Fair value of plan assets at end of year 0 0 0
Funded Status (Recognized Liability) (7,900,000) (8,100,000)  
Non-qualified benefit plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 2,000,000.0 3,100,000  
Service cost 0 0 0
Interest cost 100,000 100,000 0
Plan participants’ contributions 0 0  
Actuarial (gain) loss 0 (600,000)  
Benefits paid 0 0  
Settlement 0 (600,000)  
Benefit obligation at end of year 2,100,000 2,000,000.0 3,100,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 0 600,000  
Participant contributions 0 0  
Benefits paid 0 0  
Settlement 0 (600,000)  
Fair value of plan assets at end of year 0 0 $ 0
Funded Status (Recognized Liability) $ (2,100,000) $ (2,000,000.0)