Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Earnings Per Share
Net (loss) income as reported	$ (12,768)	$ 3,449	$ (10,071)	$ 9,388
Net (loss) income attributable to common shareholders	$ (12,768)	$ 3,449	$ (10,071)	$ 9,388
Weighted-average basic common shares	16,342,419	16,180,104	16,293,042	16,152,007
Weighted average dilutive common shares	16,342,419	16,364,447	16,293,042	16,361,514
Per common share:
Net (loss) income per common share - basic (in dollars per share)	$ (0.78)	$ 0.21	$ (0.62)	$ 0.58
Net (loss) income per common share - dilutive (in dollars per share)	$ (0.78)	$ 0.21	$ (0.62)	$ 0.57
Antidilutive securities (in shares)	69,000	263,343	73,000	263,343