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Reconciliation of Other Comprehensive Income (Loss)
9 Months Ended
Sep. 30, 2011
Reconciliation of Other Comprehensive Income (Loss) [Abstract] 
Reconciliation of Other Comprehensive Income (Loss)
Note 6.  Reconciliation of Other Comprehensive Income

   
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
   
2011
  
2010
  
2011
  
2010
 
              
Net realized gains on investments included in net income
 $903  $211  $974  $224 
                  
Other components of comprehensive income:
                
Net pre-tax unrealized gains on investments arising during period
 $14,806  $4,300  $17,054  $14,103 
Reclassification adjustment
  (567)  (211)  (638)  (224)
Net pre-tax unrealized gains on investments recognized in other comprehensive income
    14,239     4,089     16,416     13,879 
Fair value adjustment to derivative financial instrument
  188   (65)  453   (251)
Deferred income tax attributable to other comprehensive income
  (5,049)  (1,409)  (5,904)  (4,770)
Change in accumulated other comprehensive income
  9,378   2,615   10,965   8,858 
Accumulated other comprehensive income (loss), beginning of period
  (520)  838   (2,107)  (5,405)
Accumulated other comprehensive income, end of period
 $8,858  $3,453  $8,858  $3,453