Consolidated Statement Of Operations (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Potentially dilutive securities that have been excluded from earnings per share:
Share Based Payments	$ 2,439	$ 2,266	$ 4,827	$ 4,399
Anti-dilutive securities excluded from computation of earnings per share (in shares)	6,944,496	7,257,604	7,022,238	10,003,220
Common Units Of Limited Partnership Interest [Member]
Potentially dilutive securities that have been excluded from earnings per share:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	6,944,496	7,257,604	7,022,238	7,260,561
Unvested Stock Awards Outstanding [Member]
Potentially dilutive securities that have been excluded from earnings per share:
Anti-dilutive securities excluded from computation of earnings per share (in shares)
Contingently Issuable Share Awards [Member]
Potentially dilutive securities that have been excluded from earnings per share:
Anti-dilutive securities excluded from computation of earnings per share (in shares)				2,188,470
Options To Acquire Common Shares Outstanding [Member]
Potentially dilutive securities that have been excluded from earnings per share:
Anti-dilutive securities excluded from computation of earnings per share (in shares)				554,189