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Basis of Presentation and General Information (Carrying Amount And Activity Of Goodwill) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2016
Jan. 01, 2016
Carrying amount and activity of goodwill    
Goodwill, Beginning Balance $ 74,584 $ 75,429
Foreign currency translation adjustment (2,208) (845)
Goodwill, Ending Balance 72,376 74,584
The Hackett Group [Member]    
Carrying amount and activity of goodwill    
Goodwill, Beginning Balance 43,450 44,295
Foreign currency translation adjustment (2,208) (845)
Goodwill, Ending Balance 41,242 43,450
Hackett Technology Solutions [Member]    
Carrying amount and activity of goodwill    
Goodwill, Beginning Balance 31,134 31,134
Foreign currency translation adjustment
Goodwill, Ending Balance $ 31,134 $ 31,134