Earnings Per Share (Potentially Dilutive Shares Excluded From The Denominator For The Purpose Of Computing Diluted Earnings Per Share) (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially Dilutive Securities Excluded from the Denominator	8,215,904	11,908,333
Common Units of Limited Partnership Interest [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially Dilutive Securities Excluded from the Denominator	6,914,716	7,100,844
Unvested Stock Awards Outstanding [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially Dilutive Securities Excluded from the Denominator	650,379	1,779,890
Contingently Issuable Share Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially Dilutive Securities Excluded from the Denominator	650,809	3,027,599