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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Estimated Fair Value Of Financial Instruments
The following table presents estimated fair values of financial instruments at December 31, 2012 and 2011.
 
December 31,
 
2012
 
2011
 
(Amounts in thousands)
Assets
 
 
 
Investments
$
3,180,095

 
$
3,062,421

Liabilities
 
 
 
Interest rate swap agreements
$
103

 
$
670

Equity contracts
$
175

 
$
655

Secured notes
$
140,000

 
$
140,000

Direct Premium Attributable By Segment
The annual direct premiums written attributable to private passenger automobile, homeowners, commercial automobile, and other lines of insurance were as follows:
 
Year Ended December 31,
 
2012
 
2011
 
2010
 
(Amounts in thousands)
Private passenger automobile
$
2,140,531

 
$
2,105,602

 
$
2,115,763

Homeowners
318,295

 
285,188

 
261,560

Commercial automobile
74,655

 
75,642

 
84,503

Other lines
122,239

 
113,251

 
96,999

Total
$
2,655,720

 
$
2,579,683

 
$
2,558,825