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Selected Quarterly Financial Data - Schedule of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 242,889	$ 270,471	$ 243,671	$ 252,604	$ 266,283	$ 279,015	$ 241,409	$ 234,528	$ 1,009,635	$ 1,021,235	$ 1,029,098
Gross profit	72,854	87,548	79,308	83,622	87,347	89,889	76,257	70,965	323,332	324,458	324,964
Net income (loss)	$ (12,950)	$ 5,950	$ 2,778	$ 5,326	$ 7,694	$ 8,187	$ 2,124	$ (1,119)	$ 1,104	$ 16,886	$ 15,297
Basic earnings per share	$ (0.62)	$ 0.28	$ 0.13	$ 0.25	$ 0.36	$ 0.38	$ 0.10	$ (0.05)	$ 0.05	$ 0.78	$ 0.70
Diluted earnings per share	$ (0.62)	$ 0.28	$ 0.13	$ 0.24	$ 0.35	$ 0.38	$ 0.10	$ (0.05)	$ 0.05	$ 0.77	$ 0.70

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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