Mortgage and Other Indebtedness (Derivative Instrument Risk) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in Earnings (Effective Portion)	$ (646)	$ (551)	$ (1,169)	$ (1,099)
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	1,435		1,435
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in OCI/L (Effective Portion)	$ 570	$ 370	$ 930	$ 774