Income Taxes (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefit, beginning balance	$ 3,501	$ 2,049	$ 1,156
Increases from positions taken during prior periods	1,525	157	110
Increases from positions taken during current period	558
Settled positions and reclassifications		1,295	783
Lapse of statute of limitations	(1,042)	0	0
Unrecognized tax benefit, ending balance	$ 4,542	$ 3,501	$ 2,049