Commitments And Contingencies (Details) (USD $) In Millions, except Share data	1 Months Ended
	Mar. 31, 2011	Sep. 30, 2011
Commitments and Contingencies Disclosure [Abstract]
Final judgment related to a previously disclosed lawsuit	$ 16.2
Operating partnership units, outstanding		360,314
Operating partnership units outstanding, fair value		$ 29.7