Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed for PES Acquisition (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jan. 03, 2015	Mar. 31, 2014
Business Acquisition [Line Items]
Business Combination, Contingent Consideration	$ 7,234		$ 7,053
PES [Member]
Business Acquisition [Line Items]
Current assets				$ 2,058
Property, plant and equipment				3,493
Goodwill				11,124
Other intangibles				1,618
Other asset				0
Current liabilities				(816)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				(2,477)
Consideration paid at closing				15,000
Business Combination, Contingent Consideration				2,477
Net assets acquired and liabilities assumed				17,477
PES [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 0	$ 15,000
as initially reported | PES [Member]
Business Acquisition [Line Items]
Current assets				2,211
Property, plant and equipment				3,493
Goodwill				10,792
Other intangibles				1,600
Other asset				21
Current liabilities				(816)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				(2,301)
Consideration paid at closing				15,000
Business Combination, Contingent Consideration				2,301
Net assets acquired and liabilities assumed				17,301
Scenario, Adjustment [Member] | PES [Member]
Business Acquisition [Line Items]
Current assets				(153)
Property, plant and equipment				0
Goodwill				332
Other intangibles				18
Other asset				(21)
Current liabilities				0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				(176)
Consideration paid at closing				0
Business Combination, Contingent Consideration				176
Net assets acquired and liabilities assumed				$ 176