Business Acquisition (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended									12 Months Ended
	Jan. 24, 2014	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Oct. 04, 2015	Jul. 05, 2015	Apr. 05, 2015	Jun. 29, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Net sales		$ 131,914	$ 74,533	$ 69,516	$ 65,942	$ 115,744	$ 72,325	$ 84,609	$ 82,971		$ 341,905	$ 355,649	$ 347,198
Tech Ord [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 10,534
Cash Paid to Acquire Business	10,000									$ 534
Estimated Amount of Acquired Receivable Uncollectible	$ 20
Revenue of Acquiree Included in Consolidated Income Statement Since Acquisition Date													13,732
Earnings of Acquiree Included in Consolidated Income Statement Since Acquisition Date													$ 1,268