Equity And Accumulated Other Comprehensive Income, Net (Ownership Interest In The Operating Partnership) (Details) - shares	Sep. 30, 2015	Dec. 31, 2014
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	135,843,684	135,626,255
Percentage of total	98.00%	97.80%
Common units held by third parties
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Common units held by third parties	1,421,314	1,463,814
Percentage of total	1.00%	1.10%
Incentive Units Held By Employees And Directors
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Incentive units held by employees and directors	1,414,299	1,549,847
Percentage of total	1.00%	1.10%
Noncontrolling Interests in Operating Partnership
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	138,679,297	138,639,916
Percentage of total	100.00%	100.00%