Property, Plant and Equipment, Net (Summary Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 642,335	$ 582,502
Accumulated depreciation and depletion	(336,050)	(287,542)
Property, plant and equipment, net	306,285	294,960
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	468,171	422,071
Buildings, Improvements And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	63,592	66,746
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,768	8,106
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	21,432	22,746
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,484	8,195
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	30,182	25,654
Oil and Gas Producing Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 30,706	$ 28,984