Business Combination (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Aug. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Depreciation			$ 50,164	$ 46,864
Long-term debt	$ 490,585	$ 490,585	490,585			$ 439,000
Current maturities of long-term debt	27,246	27,246	27,246			0
Foreign Bank Debt
Business Acquisition [Line Items]
Long-term debt	29,585	29,585	29,585			$ 0
Heimbach
Business Acquisition [Line Items]
Acquisition related costs		1,600	2,000
Property, plant and equipment					$ 126,057
Depreciation		1,100	1,100
Other intangible assets					14,464
Acquired indefinite-lived intangible assets					6,000
Amortization of intangible assets		100
Operating lease, right-of-use asset					3,200
Finance lease, right-of-use asset					100
Operating lease, liability					3,200
Finance lease, liability					100
Operating lease, liability, current					1,100
Finance lease liability, current					100
Assumed debt					32,700
Pension liabilities					35,300
Revenue of acquiree since acquisition date, actual	15,600	15,600
Earnings (loss) of acquiree since acquisition date, actual	(500)	(500)
Heimbach | Foreign Bank Debt
Business Acquisition [Line Items]
Assumed debt					32,700
Long-term debt	29,600	29,600	29,600		$ 32,700
Current maturities of long-term debt	$ 27,200	27,200	27,200
Heimbach | Minimum | Foreign Bank Debt
Business Acquisition [Line Items]
Interest rate, stated percentage					0.90%
Heimbach | Maximum | Foreign Bank Debt
Business Acquisition [Line Items]
Interest rate, stated percentage					2.93%
Heimbach | Developed Technology Rights
Business Acquisition [Line Items]
Acquired finite-lived intangibles					$ 8,500
Finite-lived intangible assets, useful life					9 years
Amortization of intangible assets		$ 100	$ 100
Heimbach | Trade Names
Business Acquisition [Line Items]
Acquired indefinite-lived intangible assets					$ 6,000