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Accumulated Other Comprehensive Loss
6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Loss [Abstract]  
Comprehensive Income Note [Text Block]

8. Accumulated Other Comprehensive Loss

Net unrealized losses recorded in accumulated other comprehensive loss were as follows:

June 30, 2018December 30, 2017
$$
Currency translation adjustment(8,298)(6,963)
Cash flow hedges, net of income taxes(25)(305)
(8,323)(7,268)