Acquisitions (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 27, 2013	Sep. 27, 2013	Sep. 28, 2012	Dec. 31, 2012
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Cash	$ (143,000)	$ (143,000)
Accounts Receivable	3,122,000	3,122,000
Inventories	3,423,000	3,423,000
Property, plant and equipment	446,000	446,000
Other tangible assets	797,000	797,000
Goodwill	203,960,000	203,960,000		192,046,000
Other intangible assets	4,788,000	4,788,000
Liabilities	(4,248,000)	(4,248,000)
Total of net assets acquired	17,964,000	17,964,000
Total consideration	17,821,000	17,821,000
Payments to Acquire Businesses, Net of Cash Acquired		19,934,000	83,390,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	4,200,000	4,700,000
Customer Lists and Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	4,600,000	4,600,000
Other Intangible Assets [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	0	0
Minimum [Member] | Customer Lists and Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		6 years
Maximum [Member] | Customer Lists and Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		21 years
2013 Acquisitions [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired		16,900,000
Series of Individually Immaterial Business Acquisitions [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Goodwill	$ 9,493,000	$ 9,493,000
Series of Individually Immaterial Business Acquisitions [Member] | Minimum [Member] | Customer Lists and Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		7 years
Series of Individually Immaterial Business Acquisitions [Member] | Minimum [Member] | Other Intangible Assets [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		3 years
Series of Individually Immaterial Business Acquisitions [Member] | Maximum [Member] | Customer Lists and Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		10 years
Series of Individually Immaterial Business Acquisitions [Member] | Maximum [Member] | Other Intangible Assets [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Finite-Lived Intangible Asset, Useful Life		5 years