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Other Comprehensive Earnings - Changes in Accumulated Other Comprehensive Earnings/(Loss) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2013
Sep. 30, 2012
Sep. 29, 2013
Sep. 30, 2012
Changes in Accumulated Other Comprehensive Income        
Accumulated other comprehensive loss, Beginning balance     $ (120,604)  
Other comprehensive loss before reclassifications     63  
Amounts reclassified from accumulated other comprehensive loss     4,190  
Net current period other comprehensive loss 2,306 1,885 4,253 3,892
Accumulated other comprehensive loss, Ending balance (116,351)   (116,351)  
Cumulative translation adjustment [Member]
       
Changes in Accumulated Other Comprehensive Income        
Accumulated other comprehensive loss, Beginning balance     1,219  
Other comprehensive loss before reclassifications     (166)  
Amounts reclassified from accumulated other comprehensive loss         
Net current period other comprehensive loss     (166)  
Accumulated other comprehensive loss, Ending balance 1,053   1,053  
Defined benefit pension item [Member]
       
Changes in Accumulated Other Comprehensive Income        
Accumulated other comprehensive loss, Beginning balance     (120,843)  
Other comprehensive loss before reclassifications         
Amounts reclassified from accumulated other comprehensive loss     4,046  
Net current period other comprehensive loss     4,046  
Accumulated other comprehensive loss, Ending balance (116,797)   (116,797)  
Unrealized gains and losses on cash flow hedges [Member]
       
Changes in Accumulated Other Comprehensive Income        
Accumulated other comprehensive loss, Beginning balance     (980)  
Other comprehensive loss before reclassifications     229  
Amounts reclassified from accumulated other comprehensive loss     144  
Net current period other comprehensive loss     373  
Accumulated other comprehensive loss, Ending balance $ (607)   $ (607)