Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Change in foreign currency translation adjustment before reclassifications	$ (1,102)	$ (1,214)	$ (4,318)
Amounts reclassified from comprehensive income due to divesture	0	0	(2,565)
Foreign currency translation adjustment	$ (4,280)	$ (3,178)	$ (1,964)