Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Numerator:
Net income (loss)									$ 5,961	$ (7,594)	$ 55,458
Denominator for basic EPS:
Weighted average shares outstanding									30,778	26,363	24,825
Effect of dilutive securities stock options, restricted stock and restricted stock units									195	0	1,150
Denominator for diluted EPS									30,973	26,363	25,975
Basic (in dollars per share)	$ 0.26	$ 0.37	$ (0.03)	$ (0.41)	$ (0.85)	$ 0.00	$ 0.36	$ 0.32	$ 0.19	$ (0.29)	$ 2.23
Diluted (in dollars per share)	$ 0.25	$ 0.37	$ (0.03)	$ (0.41)	$ (0.85)	$ 0.00	$ 0.35	$ 0.31	$ 0.19	$ (0.29)	$ 2.14