Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Current provision (benefit):
Federal									$ (2,130)	$ 0	$ (3)
State									17	120	72
Foreign									4,069	1,804	198
Total current provision (benefit)									1,956	1,924	267
Deferred provision (benefit):
Federal									66	(42,150)	0
State									0	(2,165)	0
Foreign									(729)	(1,247)	(15)
Total deferred provision (benefit)									(663)	(45,562)	(15)
Total provision (benefit) from income taxes	$ (1,142)	$ 1,028	$ 1,040	$ 367	$ 26	$ 50	$ (43,744)	$ 30	$ 1,293	$ (43,638)	$ 252