Acquisition Activity (Schedule of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Nov. 01, 2019	Mar. 28, 2020	Dec. 31, 2019
Intangible assets:
Goodwill		$ 34,511	$ 35,018
Dynamic Systems Inc.
Business Acquisition [Line Items]
Working capital	$ 6,874
Property and equipment	1,727
Long-term deferred income tax liability	(4,321)
Non-controlling interest	(299)
Intangible assets:
Total intangible assets	17,894
Fair value of acquired identifiable assets	21,875
Purchase price	40,481
Goodwill	18,606
Dynamic Systems Inc. | Trade names
Intangible assets:
Total intangible assets	3,300
Dynamic Systems Inc. | Patents and acquired technology
Intangible assets:
Total intangible assets	10,250
Dynamic Systems Inc. | Customer relationships
Intangible assets:
Total intangible assets	$ 4,344