Debt And Liquidity (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 1,814,404	$ 1,812,823
Less: Short-term debt	(138)	(141)
Long-term debt	1,814,266	1,812,682
Senior Subordinated Notes
Debt Instrument [Line Items]
Total debt	1,813,785	1,812,204
Other debt
Debt Instrument [Line Items]
Total debt	$ 619	$ 619

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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