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Comprehensive Income
6 Months Ended
Jun. 30, 2011
Comprehensive Income [Abstract]  
Comprehensive Income
(9)  Comprehensive Income

Comprehensive income consisted of the following (in thousands):

   
Quarters Ended June 30,
  
Six Months Ended June 30,
 
   
2011
  
2010
  
2011
  
2010
 
Net income
 $21,217  $6,345  $33,552  $15,613 
Unrealized gain (loss) on investments
  500   -   1,100   (500)
Defined benefit plans, net of tax
  (155)  (447)  (127)  (281)
Total comprehensive income
 $21,562  $5,898  $34,525  $14,832