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Fair Value Measurements and Investments Fair Value of Long-Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Long-term debt, net of current maturities $ 1,199,724 $ 1,199,052
Total long-term debt, excluding leases and current maturities 1,102,700 1,112,100
Senior Notes | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 1,190,300 1,189,500
Total long-term debt, excluding leases and current maturities 1,093,300 1,102,500
Other Long-Term Debt | Other Long-Term Debt    
Debt Instrument [Line Items]    
Long-term debt 9,400 9,600
Total long-term debt, excluding leases and current maturities $ 9,400 $ 9,600