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Employee Benefit Plans - Pension Plans Narrative (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
pensionPlan
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of Defined Benefit Plans | pensionPlan 2    
Fair value of plan assets $ 438,200 $ 403,500  
Benefit obligation 524,300 558,400  
Items not yet recognized as net periodic pension cost (benefit) 119,900 165,900  
Loss on plan obligations 22,100 27,700  
Net actuarial loss due to assumption changes   37,100  
Net gains due to plan experience   9,500  
Net periodic pension benefit 8,900 0 $ 0
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 411,100 378,900  
Benefit obligation 437,500 470,100  
Unfunded status of plan $ (26,400) $ (91,200)