Summary of Significant Accounting Policies (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Partially Owned Consolidated Properties	20
Partially Owned Consolidated Units	4,020
Noncontrolling Interests - Partially Owned Properties	$ 127,658,000	$ 126,583,000
Partially Owned Limited Life Partnership Properties	6
Noncontrolling Interest Balance Limited Life Partnerships	(10,000,000)
Noncontrolling Interests Settlement Value	$ 52,524,206