Debt (Schedule Of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt payable, net to 2038	$ 1,651,050	$ 1,653,154
Debt service guaranty liability	57,380	57,380
Finance lease obligation	21,723	21,804
Total	$ 1,730,153	$ 1,732,338
Debt Payable Due Date Two Thousand Thirty Eight [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt stated interest rate	3.30%	3.30%
Debt Payable Due Date Two Thousand Thirty Eight [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt stated interest rate	7.00%	7.00%
Debt Payable Due Date Two Thousand Thirty Eight [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Debt stated interest rate	3.90%	3.90%

Amount of short-term and long-term debt and lease obligation.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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