Debt and Credit Facilities - Covenants and Default Provisions (Details)	Jun. 30, 2012
PEC
Collateralized obligations
Ratio of indebtedness to net capital	0.65
PEF
Collateralized obligations
Ratio of indebtedness to net capital	0.65

Total Aggregate Indebtedness divided by Net Capital.

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

-Publisher SEC

-Name Rule 15c3

-Number 240

-Article 15c3

-Section 1

-Subsection a

-Paragraph 1

-Subparagraph i

Name:	us-gaap_RatioOfIndebtednessToNetCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant