Goodwill (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
Mar. 28, 2020 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 35,018
Foreign currency translation adjustment	(507)
Ending balance	34,511
KELK Acquisition \| Weighing and Control Systems Segment
Goodwill [Roll Forward]
Beginning balance	6,559
Foreign currency translation adjustment	(500)
Ending balance	6,059
DSI Acquisition \| Weighing and Control Systems Segment
Goodwill [Roll Forward]
Beginning balance	18,606
Foreign currency translation adjustment	(7)
Ending balance	18,599
Stress-Tek Acquisition \| Weighing and Control Systems Segment
Goodwill [Roll Forward]
Beginning balance	6,311
Foreign currency translation adjustment	0
Ending balance	6,311
Pacific Acquisition \| Foil Technology Products Segment
Goodwill [Roll Forward]
Beginning balance	3,542
Foreign currency translation adjustment	0
Ending balance	$ 3,542

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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