Income Taxes (Reconciliation of the Federal Statutory and Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
(Loss) income before income tax (benefit) provision	$ (64,158)	$ 87,723
Statutory taxes at 21.0%	(13,473)	18,422
State and local income taxes	(4,392)	1,629
Non-deductible expenses	1,071	745
Percentage depletion	(3,455)	(4,866)
R&D and other federal credits	(109)	(300)
Settlements and uncertain tax positions	(3,512)	(787)
Other, net	(701)	(1,278)
Income tax (benefit) provision	$ (24,571)	$ 13,565
Effective income tax rate	38.30%	15.50%