Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,000,000	1,800,000	900,000	900,000
Net income (loss)	$ (2,419)	$ 5,171	$ 7,442	$ 16,429
Basic income (loss) per share	$ (0.09)	$ 0.19	$ 0.28	$ 0.60
Weighted average shares outstanding, basic	26,652,000	27,453,000	26,991,000	27,370,000
Diluted income (loss) per share	$ (0.09)	$ 0.19	$ 0.27	$ 0.60
Weighted average dilutive stock options	0	83,000	137,000	144,000
Weighted average shares outstanding, diluted	26,652,000	27,536,000	27,128,000	27,514,000