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Accumulated Other Comprehensive Loss
3 Months Ended
Mar. 31, 2018
Accumulated Other Comprehensive Loss [Abstract]  
Comprehensive Income Note [Text Block]

8. Accumulated Other Comprehensive Loss

Net unrealized gains/(losses) recorded in accumulated other comprehensive loss were as follows:

March 31, 2018December 30, 2017
$$
Currency translation adjustment(5,627)(6,963)
Cash flow hedges, net of income taxes402(305)
(5,225)(7,268)