Equity and Accumulated Other Comprehensive Income, Net (Ownership Interest In The Operating Partnership) (Details) - shares	Jun. 30, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Partners' capital account units (units)	146,859,067	146,384,247
Percentage of total	98.30%	98.10%
Common units held by third parties
Class of Stock [Line Items]
Common units held by third parties (units)	1,218,814	1,421,314
Percentage of total	0.80%	1.00%
Incentive Units Held By Employees And Directors
Class of Stock [Line Items]
Incentive units held by employees and directors (units)	1,318,342	1,412,012
Percentage of total	0.90%	0.90%
Noncontrolling Interests in Operating Partnership
Class of Stock [Line Items]
Partners' capital account units (units)	149,396,223	149,217,573
Percentage of total	100.00%	100.00%