Summary Of Significant Accounting Policies (Narrative) (Details)	9 Months Ended	12 Months Ended		12 Months Ended
Sep. 30, 2011	Dec. 31, 2010 Minimum [Member]	Dec. 31, 2010 Maximum [Member]	Sep. 30, 2011 Ecova [Member]	Dec. 31, 2008 Cadence Network [Member]	Dec. 31, 2009 Ecos [Member]	Dec. 31, 2010 The Loyalton Group [Member]
Owners percentage interest				79.20%
Intangible assets amortization period, years		5	7		12	3	6
Investment portfolio percentage rated AA or higher	92.00%

The useful life of all finite-lived intangible assets.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 12, 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 350

-SubTopic 30

-Section 35

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6904245&loc=d3e15372-109273

Name:	us-gaap_FiniteLivedIntangibleAssetsUsefulLife
Namespace Prefix:	us-gaap
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration