Mortgage and Other Indebtedness (Derivative Instrument Risk) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in Earnings (Effective Portion)	$ (518)	$ (551)	$ (1,687)	$ (1,650)
Gain Recognized in Earnings (Ineffective Portion)	0	0	0	0
Other Comprehensive Income (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Losses expected to be reclassified from AOCI to interest expense	969		969
Interest rate contracts/hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in OCI/L (Effective Portion)	$ 457	$ 597	$ 1,387	$ 1,371