Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed for Market Forge Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013	Sep. 08, 2014 as initially reported	Sep. 08, 2014 Scenario, Adjustment [Member]	Jan. 07, 2014 Market Forge [Member]	Jan. 07, 2014 Market Forge [Member] as initially reported	Jan. 07, 2014 Market Forge [Member] Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Property, plant and equipment				$ 0	$ 120	$ 120	$ 0
Current assets			3,767	0	2,051	2,051	0
Goodwill			11,255	55	5,660	5,252	408
Other intangibles					4,191	4,191	0
Current liabilities			2,296	55	4,782	4,374	408
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net			12,861	0	7,240	7,240	0
Business Acquisition, Deferred Payments					3,000	3,000	0
Business Combination, Contingent Consideration	9,311	8,628	4,710	55	1,454	1,374	80
Net assets acquired and liabilities assumed			$ 17,571	$ 55	$ 11,694	$ 11,614	$ 80