Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Numerator for basic EPS:
Net income (loss)									$ (7,594)	$ 55,458	$ 36,267
Denominator for basic EPS:
Weighted average shares outstanding									26,363	24,825	23,991
Effect of dilutive securities stock options, restricted stock and restricted stock units									0	1,150	1,332
Denominator for diluted EPS									26,363	25,975	25,323
Basic (in dollars per share)	$ (0.85)	$ 0.00	$ 0.36	$ 0.32	$ 0.57	$ 0.56	$ 0.50	$ 0.61	$ (0.29)	$ 2.23	$ 1.51
Diluted (in dollars per share)	$ (0.85)	$ 0.00	$ 0.35	$ 0.31	$ 0.54	$ 0.54	$ 0.48	$ 0.58	$ (0.29)	$ 2.14	$ 1.43