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International Retirement Plan
9 Months Ended
Sep. 30, 2011
International Retirement Plan [Abstract] 
International Retirement Plan
(9) International Retirement Plan
The following table shows the components of net periodic benefit costs and other amounts recognized in the condensed consolidated statements of operations and comprehensive income for the quarter and nine months ended September 30, 2011 and 2010:
                                 
    Quarter Ended September 30,     Nine months Ended September 30,  
(in thousands)   2011     2010     2011     2010  
Service cost
  $ 28     $ 24     $ 85     $ 74  
Interest cost
    31       22       95       70  
 
                       
Total
  $ 59     $ 46     $ 180     $ 144