Intangible Assets (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 15, 2013		Jun. 16, 2012	Jun. 15, 2013		Jun. 16, 2012	Dec. 29, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 200,000		$ 200,000	$ 400,000		$ 300,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	700,000			700,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	600,000			600,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	600,000			600,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	500,000			500,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	400,000			400,000
Intangible Assets, Gross	11,170,000			11,170,000			8,400,000
Finite-Lived Intangible Assets, Accumulated Amortization	4,200,000			4,200,000			3,845,000
Intangible Assets, Net (Excluding Goodwill)	6,970,000			6,970,000			4,555,000
Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				9 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				16 years
Patents, formulae, and licenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				15 years
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				5 years
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				4 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	3,479,000	[1]		3,479,000	[1]		1,729,000
Finite-Lived Intangible Assets, Accumulated Amortization	393,000	[1]		393,000	[1]		274,000
Intangible Assets, Net (Excluding Goodwill)	3,086,000	[1]		3,086,000	[1]		1,455,000
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	642,000	[1]		642,000	[1]		539,000
Finite-Lived Intangible Assets, Accumulated Amortization	202,000	[1]		202,000	[1]		164,000
Intangible Assets, Net (Excluding Goodwill)	440,000	[1]		440,000	[1]		375,000
Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	4,286,000			4,286,000			4,296,000
Finite-Lived Intangible Assets, Accumulated Amortization	2,736,000			2,736,000			2,635,000
Intangible Assets, Net (Excluding Goodwill)	1,550,000			1,550,000			1,661,000
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	987,000	[1]		987,000	[1]		777,000
Finite-Lived Intangible Assets, Accumulated Amortization	576,000	[1]		576,000	[1]		510,000
Intangible Assets, Net (Excluding Goodwill)	411,000	[1]		411,000	[1]		267,000
Patents, formulae, and licenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	1,776,000	[1]		1,776,000	[1]		1,059,000
Finite-Lived Intangible Assets, Accumulated Amortization	293,000	[1]		293,000	[1]		262,000
Intangible Assets, Net (Excluding Goodwill)	$ 1,483,000	[1]		$ 1,483,000	[1]		$ 797,000

[1] (a) Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisition described in Note 3 that may be adjusted as additional information becomes known.