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Accumulated Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2012
Other Comprehensive Loss  
Net Change and ending balances for the various components of other comprehensive income (loss) and for accumulated other comprehensive loss
                                         
    

Foreign

Currency

Translation

Adjustments

   

Unrecognized

Components

of Employee

Benefit Plans

   

Unrealized
Holding Gains

(Losses) on

Securities

    Derivatives     Accumulated
Other
Comprehensive
Loss
 

Balance at January 1, 2010

      $ (3,769       $ (61,457       $ 287         $ 695         $ (64,244

Net Change

    (1,620     5,596       290       504       4,770  

Balance at December 31, 2010

    (5,389     (55,861     577       1,199       (59,474

Net Change

    653       (19,364     (15     (1,090     (19,816

Balance at December 31, 2011

    (4,736     (75,225     562       109       (79,290

Net Change

    3,193       (6,558     71       209       (3,085

Balance at December 31, 2012

      $ (1,543       $ (81,783       $ 633         $ 318         $ (82,375
Summary of tax benefit changes
                         
     2012     2011     2010  

Tax benefit (expense) associated with changes in:

                       

Unrecognized employee benefit costs

  $     5,256     $     12,958     $     (2,219

Unrealized holding gains (losses) on marketable securities

    (80     15       (144

Fair value of cash flow hedges

    (61     427       (801

Tax benefit (expense) associated with reclassification adjustments:

                       

Amortization of unrecognized employee benefit costs

    (2,632     (2,065     (1,745

Realized (gains) losses from sale of marketable securities

    42       (7     (12

Realized losses (gains) from settlement of cash flow hedges

    (68     228       503