Goodwill and Other Intangible Assets (Schedule of Changes in Intangible Assets and Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 38,576
Other Changes	0
Amortization	(2,563)
Currency Translation	(401)
Ending balance	35,612
Goodwill [Roll Forward]
Beginning balance	180,181
Ending balance	178,236
Indefinite-Lived Intangible Assets Including Goodwill [Roll Forward]
Beginning Balance	186,251
Other Changes	0
Currency Translation	(2,122)
Ending Balance	184,129
MC Goodwill
Goodwill [Roll Forward]
Beginning balance	66,873
Other Changes	0
Currency Translation	(1,433)
Ending balance	65,440
AEC Goodwill
Goodwill [Roll Forward]
Beginning balance	113,308
Other Changes	0
Currency Translation	(512)
Ending balance	112,796
Heimbach Trade name
Indefinite-Lived Intangible Assets [Roll Forward]
Beginning Balance	6,070
Other Changes	0
Currency Translation	(177)
Ending Balance	5,893
AEC Trademarks and trade names
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	22
Other Changes	0
Amortization	(6)
Currency Translation	0
Ending balance	16
AEC Technology
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	3,426
Other Changes	0
Amortization	(283)
Currency Translation	(97)
Ending balance	3,046
AEC Intellectual property
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	911
Other Changes	0
Amortization	(42)
Currency Translation	0
Ending balance	869
AEC Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	25,485
Other Changes	0
Amortization	(1,740)
Currency Translation	(60)
Ending balance	23,685
Heimbach Developed technology
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	8,732
Other Changes	0
Amortization	(492)
Currency Translation	(244)
Ending balance	$ 7,996