Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed for PES Acquisition (Details) (USD $)	0 Months Ended
	Mar. 31, 2014	Jun. 28, 2014	Dec. 28, 2013
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 15,000,000
Business Combination, Contingent Consideration		10,174,000	8,628,000
as initially reported | PES [Member]
Business Acquisition [Line Items]
Current assets	2,211,000
Property, plant and equipment	3,493,000
Goodwill	10,792,000
Other intangibles	1,600,000
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets	21,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(3,117,000)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	15,000,000
Business Combination, Contingent Consideration	2,301,000
Net assets acquired and liabilities assumed	17,301,000
Food Processing | Developed Technology | PES [Member]
Business Acquisition [Line Items]
Other intangibles	600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Food Processing | Backlog [Member] | PES [Member]
Business Acquisition [Line Items]
Other intangibles	100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 months
Food Processing | Customer Relationships [Member] | PES [Member]
Business Acquisition [Line Items]
Other intangibles	$ 900,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years