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Business And Summary Of Significant Accounting Policies (Narrative) (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Depreciation expense $ 55,000 $ 51,500 $ 49,700
Capital Expenditures Incurred but Not yet Paid 15,700 8,900  
Debt Issuance Costs, Net 11,800 18,100  
Amortization of debt issuance costs $ 8,642 9,179 4,125
Related Party Tax Agreement Percent Of Savings 85.00%    
Environmental remediation, compliance and management expenses $ 16,900 11,100 11,600
Accrued liability relating to environmental remediation 4,900 4,900  
Amortization of Other Deferred Charges 4,600 6,000 $ 5,100
Deferred costs; amount deferred in period. $ 700 $ 10,200