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Fair Value Measurements - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Unfunded commitments   $ 5,300,000 $ 5,600,000  
Unfunded commitment term   10 years    
Proceeds from sale of strategic investment $ 31,500,000 $ 0 31,500,000 $ 0
Gain on sale of investments $ 19,300,000 100,000    
Impairment   0 0  
Impairment adjustments   11,500,000 0  
Finance lease obligations   100,000,000.0 101,100,000  
Debt securities, held-to-maturity, restricted   81,600,000 79,100,000  
Held-to-maturity, allowance for credit loss   200,000 200,000  
Restricted cash   18,200,000 15,400,000  
Restricted investments, fair value   80,300,000 76,700,000  
Total debt including finance lease obligations   1,405,200,000 1,472,500,000  
Fair Value, Nonrecurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value   0 0  
Liabilities, fair value   0 0  
Privately Held Companies        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity method investments   15,400,000 16,000,000  
Equity securities where fair value is not readily determinable   71,900,000 83,200,000  
Debt Obligations - Long Term Bonds        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Finance lease obligations   100,000,000.0 101,100,000  
Debt Obligations - Long Term Bonds | Estimate of Fair Value        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Finance lease obligations   102,200,000 105,700,000  
Variable Interest Rate        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total debt including finance lease obligations   555,200,000 821,400,000  
Senior Notes Issued 2018        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Senior notes   550,000,000.0 550,000,000.0  
Senior Notes Issued 2018 | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt instrument, fair value   503,200,000 $ 494,600,000  
Wickliffe, Kentucky Manufacturing Facility        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Finance lease obligations   $ 80,000,000