Debt (Schedule Of Debt) (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt payable, net to 2038		$ 1,654,075		$ 1,706,886
Unsecured notes payable under credit facilities		0		5,000
Debt service guaranty liability		60,900		60,900
Finance lease obligation		21,828	$ 21,900
Finance lease obligation				21,898
Total	[1]	$ 1,736,803		$ 1,794,684
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%		4.00%

[1] Consolidated variable interest entities' assets and debt included in the above balances (see Note 15) at September 30, 2019 and December 31, 2018 are Property, net of $197,312 and $198,466; Accrued Rent, Accrued Contract Receivables and Accounts Receivable, net of $9,825 and $12,220; Cash and Cash Equivalents of $10,388 and $8,243; Debt, net of $45,191 and $45,774.