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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]      
Reserve for policy cancellations $ 6,396 $ 5,559  
Estimated useful lives of the related assets, minimum (in years) 3    
Estimated useful lives of the related assets, maximum (in years) 15    
Estimated lives of amortizable intangible assets, minimum (in years) 5    
Estimated lives of amortizable intangible assets, maximum (in years) 15    
Outstanding options to purchase shares of common stock   12,000 12,000