Equity and Redeemable Noncontrolling Interest - Rollforward of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 14,659	$ 28,008
Total gains or losses (realized/unrealized):
Foreign currency translation	367	(653)
Ending balance	15,317	25,824
Net income attributable to noncontrolling interest
Total gains or losses (realized/unrealized):
Income (loss) attributable to noncontrolling interest	291	320
Change in fair value, included in additional paid-in capital
Total gains or losses (realized/unrealized):
Income (loss) attributable to noncontrolling interest	$ 0	$ (1,851)