Summary of Significant Accounting Policies (Details Textuals) (USD $) In Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Dec. 31, 2006
Organization of The Parent Company and The Operating Partnership (Textuals) [Abstract]
Depreciation and amortization expense relating to intangibles	$ 4.7
PJP VII [Member]
Organization of The Parent Company and The Operating Partnership (Textuals) [Abstract]
Payment guarantees other than the guarantee	0.7	0.7
Restatement Adjustment [Member]
Organization of The Parent Company and The Operating Partnership (Textuals) [Abstract]
Depreciation and amortization expense relating to intangibles	$ 4.7	$ 4.7	$ 1.7	$ 1.4	$ 1.8	$ 1.7	$ 1.5