Goodwill and Other Intangible Assets (Schedule of Changes in Intangible Assets and Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 52,892
Other Changes	329
Amortization	(3,590)
Currency Translation	75
Ending balance	49,706
Goodwill [Roll Forward]
Beginning balance	180,934
Other Changes	335
Amortization	0
Currency Translation	33
Ending balance	181,302
Trade Names [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	73
Other Changes	0
Amortization	(8)
Currency Translation	0
Ending balance	65
Goodwill [Roll Forward]
Beginning balance	73
Ending balance	65
Developed Technology Rights [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	5,804
Other Changes	0
Amortization	(309)
Currency Translation	71
Ending balance	5,566
Goodwill [Roll Forward]
Beginning balance	5,804
Ending balance	5,566
Intellectual Property [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,243
Other Changes	0
Amortization	(41)
Currency Translation	0
Ending balance	1,202
Goodwill [Roll Forward]
Beginning balance	1,243
Ending balance	1,202
Customer Contracts [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	6,544
Other Changes	0
Amortization	(1,456)
Currency Translation	0
Ending balance	5,088
Goodwill [Roll Forward]
Beginning balance	6,544
Ending balance	5,088
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	39,147
Other Changes	329
Amortization	(1,744)
Currency Translation	4
Ending balance	37,736
Goodwill [Roll Forward]
Beginning balance	39,147
Ending balance	37,736
Other Intangible Assets [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	81
Other Changes	0
Amortization	(32)
Currency Translation	0
Ending balance	49
Goodwill [Roll Forward]
Beginning balance	81
Ending balance	49
MC Goodwill [Member]
Goodwill [Roll Forward]
Beginning balance	67,672
Other Changes	0
Amortization	0
Currency Translation	17
Ending balance	67,689
AEC Goodwill [Member]
Goodwill [Roll Forward]
Beginning balance	113,262
Other Changes	335
Amortization	0
Currency Translation	16
Ending balance	$ 113,613