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Note 10 - Restructuring (Tables)
12 Months Ended
Dec. 29, 2012
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Littelfuse, Inc. restructuring (in thousands)
     
Balance at January 2, 2010
  $ 10,917  
Additions
    1,687  
Payments
    (8,732 )
Exchange rate impact
    (107 )
Balance at January 1, 2011
    3,765  
Additions
    594  
Payments
    (2,941 )
Exchange rate impact
    23  
Balance at December 31, 2011
    1,441  
Additions
    125  
Payments
    (943 )
Exchange rate impact
    22  
Balance at December 29, 2012
  $ 645