Supplemental Cash Flow Information (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Cash and Cash Equivalents	$ 13,219	[1]	$ 16,257	[1]	$ 22,168
Restricted Deposits and Mortgage Escrows	8,115		25,022		3,074
Total	$ 21,334		$ 41,279		$ 25,242	$ 103,187

[1] * Consolidated variable interest entities' assets held as collateral and debt included in the above balances at December 31, 2017 and December 31, 2016 are Property, net of $207,969 and $476,117; Accrued Rent and Accounts Receivable, net of $12,011 and $11,066; Cash and Cash Equivalents of $9,025 and $9,560; Debt, net of $46,253 and $47,112.