Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2015	Sep. 30, 2014	Sep. 29, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) income	$ (9,821)	$ 2,943	$ (9,511)	$ 7,894
Shares:
Basic weighted average shares outstanding (in shares)	28,253,859	29,757,820	29,349,061	29,689,342
Dilutive stock options and warrants (in shares)	0	1,136,084	0	1,353,101
Diluted weighted average number of shares outstanding (in shares)	28,253,859	30,893,904	29,349,061	31,042,443
(Loss) earnings per share:
Basic EPS (USD per share)	$ (0.35)	$ 0.10	$ (0.32)	$ 0.27
Diluted EPS (USD per share)	$ (0.35)	$ 0.10	$ (0.32)	$ 0.25
Antidilutive securities excluded from computation of earnings per share	2,837,962	267,196	2,837,962	243,552
Warrant [Member]
(Loss) earnings per share:
Antidilutive securities excluded from computation of earnings per share	10,000		15,000