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Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Fair Value Measurement [Abstract]    
Financial Assets And Liabilities Carried At Fair Value Measured On A Recurring Basis
     Total
carrying
value at
December 31,
2011		      Quoted prices in
active markets
(Level 1)		      Significant
other
observable
inputs (Level 2)		      Significant
unobservable
inputs (Level 3)		  
     (Dollars in thousands)  

Cash and cash equivalents

    $ 40,005       $ 40,005       $ —       $ —   

Bonds — foreign government

      880         880         —         —   

Investments in marketable securities

      4,189         4,189         —         —   

Derivative assets

      204         —         204         —   

Derivative liabilities

      633         —         633         —   

Contingent consideration liabilities

      9,676         —         —         9,676   
     Total
carrying
value at
December 31,
2010		      Quoted prices in
active markets
(Level 1)		      Significant
other
observable
inputs (Level 2)		      Significant
unobservable
inputs (Level 3)		  
     (Dollars in thousands)  

Investments in marketable securities

    $ 4,108       $ 4,108       $ —       $ —   

Derivative assets

      880         —         880         —   

Derivative liabilities

      25,200         —         25,200         —   
Schedule Of Reconciliation Of Changes In Level 3 Financial Liabilities Measured At Fair Value On A Recurring Basis
     Contingent
consideration		  
     (Dollars in thousands)  

Balance at beginning of year

    $ —   

Initial estimate of contingent consideration

      15,400   

Payment

      (6,000 ) 

Revaluations

      276   
  

 

 

  

Balance at end of period

    $ 9,676