Quarterly Financial Data Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 130,205	$ 194,375	$ 253,177	$ 127,067	$ 129,420	$ 196,510	$ 236,483	$ 113,338	$ 704,825	$ 675,751	$ 663,174
Gross Profit	28,043	56,260	90,760	26,982	27,600	58,386	82,278	24,923	202,045	193,187	191,646
Selling, general and administrative expense	48,256	47,576	53,492	44,975	46,487	48,512	49,715	44,041	194,299	188,755	175,903
Operating Income (Loss)	(20,213)	8,684	37,268	(17,993)	(18,887)	9,874	32,563	(19,118)	7,746	4,432	15,743
Net Income (Loss) Attributable to Parent	$ (11,058)	$ 4,892	$ 20,945	$ (10,259)	$ (10,277)	$ 4,936	$ 18,304	$ (11,015)	$ 4,520	$ 1,948	$ 7,837
Earnings Per Share, Basic	$ (0.45)	$ 0.20	$ 0.85	$ (0.42)	$ (0.42)	$ 0.20	$ 0.76	$ (0.46)	$ 0.18	$ 0.08	$ 0.32
Earnings Per Share, Diluted	$ (0.45)	$ 0.20	$ 0.85	$ (0.42)	$ (0.42)	$ 0.20	$ 0.75	$ (0.46)	$ 0.18	$ 0.08	$ 0.32

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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