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Summary Of Significant Accounting Policies (Narrative) (Details)
 3 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Mar. 31, 2012
Y
Dec. 31, 2011
Y
Mar. 31, 2012
Ecova [Member]
Dec. 31, 2008
Cadence Network [Member]
Y
Dec. 31, 2009
Ecos [Member]
Y
Dec. 31, 2011
Prenova [Member]
Y
Dec. 31, 2010
The Loyalton Group [Member]
Y
Dec. 31, 2011
Minimum [Member]
Software Development Costs [Member]
Y
Mar. 31, 2012
Minimum [Member]
LPB [Member]
Y
Dec. 31, 2011
Maximum [Member]
Software Development Costs [Member]
Y
Mar. 31, 2012
Maximum [Member]
LPB [Member]
Summary Of Significant Accounting Policies [Line Items]                      
Owners percentage interest     79.20%                
Average effective maturity, in years 1.7 1.3                  
Intangible assets amortization period, years       12 3 9 6 3 3 7 10
Investment portfolio percentage rated AA or higher 92.00% 88.00%