Debt (Grouping Of Debt Between Fixed And Variable As Well As Secured And Unsecured) (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total	[1]	$ 1,736,803	$ 1,794,684
As To Interest Rate [Member]
Debt Instrument [Line Items]
Fixed-rate debt		1,719,311	1,771,999
Variable-rate debt		17,492	22,685
Total		1,736,803	1,794,684
As To Collateralization [Member]
Debt Instrument [Line Items]
Unsecured debt		1,453,817	1,457,432
Secured debt		282,986	337,252
Total		$ 1,736,803	$ 1,794,684

[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.