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 Restatement Adjustment [Member]	Jun. 30, 2011 Restatement Adjustment [Member]	Dec. 31, 2010 Restatement Adjustment [Member]	Dec. 31, 2009 Restatement Adjustment [Member]	Dec. 31, 2008 Restatement Adjustment [Member]	Dec. 31, 2007 Restatement Adjustment [Member]	Dec. 31, 2006 Restatement Adjustment [Member]	Sep. 30, 2011 PJP VII [Member]
Depreciation and amortization expense relating to intangibles	$ 4.7	$ 4.7	$ 4.7	$ 1.7	$ 1.4	$ 1.8	$ 1.7	$ 1.5
Summary Of Significant Accounting Policies (Textuals) [Abstract]
Payment guarantees other than the guarantee									$ 0.7

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 45

-Paragraph 13

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant