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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2011
Shareholders' Equity [Abstract]  
Schedule Of Changes In Equity
(Dollars in thousands)
 
December 31,
 
   
2011
   
2010
 
Accumulated foreign currency translation adjustments
  $ (1,776 )   $ (445 )
Unrealized loss on available-for-sale security, net of tax
    (226 )     (220 )
Employee benefit plans, net of tax
    (436,434 )     (279,229 )
Accumulated other comprehensive loss
  $ (438,436 )   $ (279,894 )