Investments In Joint Ventures (Aggregate Balance Sheet And Statement Of Income Data For Unconsolidated Joint Ventures) (Details) (USD $)	1 Months Ended	12 Months Ended
	Feb. 28, 2014	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Revenues from discontinued operations attributable to unconsolidated joint venture						$ 7,800,000
Total assets		757,800,000		790,200,000
Total third party debt		523,600,000		530,700,000
Total equity		203,300,000		229,600,000
Total revenues		105,600,000	[1]	93,900,000	[1]	91,600,000	[1],[2]
Gain On Sale Of Joint Venture Operating Property Net Of Tax		18,500,000		112,400,000		49,700,000
Net income (loss)		26,900,000		120,700,000		50,500,000
Equity in income of joint ventures		7,023,000	[3]	24,865,000	[3]	20,175,000	[3]
Number of fully consolidated joint ventures acquired						13
Number of operating properties sold		5		12		11
Sale of two operating properties within the funds in 2014 [Member]
Schedule of Equity Method Investments [Line Items]
Revenues from discontinued operations attributable to unconsolidated joint venture		1,100,000		7,400,000		6,800,000
Number of operating properties sold	2
Sale of 16 operating properties within two unconsolidated joint ventures in 2013 [Member]
Schedule of Equity Method Investments [Line Items]
Revenues from discontinued operations attributable to unconsolidated joint venture				17,900,000		33,500,000
Number of operating properties sold				16
Sale of 7 operating properties within two unconsolidated joint ventures in 2012 [Member]
Schedule of Equity Method Investments [Line Items]
Revenues from discontinued operations attributable to unconsolidated joint venture						$ 23,300,000
Number of operating properties sold						7

[1] (1)Excludes approximately $1.1 million, $7.4 million and $6.8 million of revenue for the years ended December 31, 2014, 2013 and 2012, respectively, related to the sale of two operating properties by the funds during the first quarter of 2014. These properties were held for sale within two of our unconsolidated joint ventures at December 31, 2013. Also excludes approximately $17.9 million and $33.5 million, respectively, related to discontinued operations from the sale of 16 operating properties within two of our unconsolidated joint ventures during 2013. Revenues for the year ended December 31, 2012 also excludes approximately $23.3 million related to discontinued operations from the sale of seven operating properties within two of our unconsolidated joint ventures during 2012.

[2] Includes approximately $7.8 million of revenues for the year ended December 31, 2012 related to 13 previously unconsolidated joint ventures acquired by us during the year ended December 31, 2012.

[3] Equity in income excludes our ownership interest of fee income from various services provided by us to the funds.