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Income Taxes (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Line Items]      
Income tax payments $ 280,700,000 $ 251,500,000 $ 204,900,000
Income taxes payable 29,400,000 2,200,000  
Income taxes receivable 300,000 9,900,000  
Unrecognized tax benefits 0    
Deferred tax liability, net 1,170,399,000 859,559,000  
Tax credit carryforwards 25,396,000 18,264,000  
Gross deferred tax assets 801,495,000 644,933,000  
Valuation allowance (13,916,000) (16,943,000)  
Estimated gross deferred tax assets including net operating losses realized through generating taxable income or reversal of existing temporary differences attributable to gross deferred tax liabilities $ 787,600,000    
Income Tax Examination, Year under Examination 2017    
Earliest Tax Year [Member]      
Income Tax Disclosure [Line Items]      
Tax credit, expiration date Dec. 31, 2033    
U.S. State Operations      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 32,900,000    
Certain Foreign Operations [Member]      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards 9,700,000    
Other Liabilities [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax liability, net 1,200,000,000 896,700,000  
Other Assets [Member]      
Income Tax Disclosure [Line Items]      
Net deferred tax assets $ 23,500,000 $ 37,200,000