Unaudited Quarterly Financial Results (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended						12 Months Ended			3 Months Ended
	Dec. 28, 2012	Sep. 30, 2012	Jun. 29, 2012	Mar. 31, 2012	Dec. 30, 2011	Mar. 31, 2011	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 Quarter as Reported [Member]	Jun. 29, 2012 Quarter as Reported [Member]	Sep. 30, 2011 Quarter as Reported [Member]	Jun. 30, 2011 Quarter as Reported [Member]	Sep. 30, 2012 Quarter as Corrections [Member]	Jun. 29, 2012 Quarter as Corrections [Member]
Selected Quarterly Financial Information [Abstract]
Sales	$ 90,067	$ 100,849	$ 101,949	$ 110,565	$ 86,873	$ 126,719	$ 403,430	$ 452,639	$ 443,134	$ 100,849	$ 101,949	$ 105,306	$ 133,741
Gross profit	11,551	14,323	14,254	15,660	9,595	17,552	55,788	58,992	59,141	14,323	14,254	12,852	18,993
Operating expenses	12,655	14,989	9,792	9,393	8,039	9,365	47,443	35,446	33,664	15,750	9,338	8,542	9,500	(761)	454
Income from operations	(1,411)	(666)	4,462	6,267	1,556	8,187	8,345	23,546	25,477	(1,427)	4,916	4,310	9,493	761	(454)
Income tax provision (benefit)	(398)	(356)	1,658	1,502	(6,341)	1,999	1,544	(1,294)	4,713	(539)	979	880	2,168	184	679
Net income	$ (1,729)	$ (1,124)	$ 2,790	$ 4,660	$ 7,801	$ 5,820	$ 5,153	$ 23,734	$ 20,097	$ (1,701)	$ 3,923	$ 3,155	$ 6,958	$ 577	$ (1,133)
Basic	$ (0.04)	$ (0.04)	$ 0.12	$ 0.20	$ 0.34	$ 0.26	$ 0.20	$ 1.05	$ 0.92	$ (0.06)	$ 0.17	$ 0.14	$ 0.31	$ 0.02	$ (0.05)
Diluted	$ (0.04)	$ (0.04)	$ 0.12	$ 0.20	$ 0.34	$ 0.25	$ 0.20	$ 1.01	$ 0.87	$ (0.06)	$ 0.17	$ 0.14	$ 0.30	$ 0.02	$ (0.05)