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Revenue Recognition - Unbilled Receivables (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 02, 2016
Jul. 04, 2015
Jul. 02, 2016
Jul. 04, 2015
Jan. 02, 2016
A rollforward of the unbilled receivables allowance          
Balance at beginning of period     $ 2,354 $ 2,233 $ 2,233
Increases to reserves     1,879   2,832
Amounts written off     (1,482)   (2,711)
Effects of foreign currency translation     (2)    
Balance at end of period $ 2,749   2,749   $ 2,354
Reimbursable expenses $ 8,511 $ 7,447 $ 16,541 $ 16,319