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Income Taxes (Reconciliation of the Federal Statutory and Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income before income tax provision	$ 87,723	$ 56,850
Statutory taxes at 21.0%	18,422	11,939
State and local income taxes	1,629	1,890
Non-deductible expenses	745	725
Percentage depletion	(4,866)	(6,245)
R&D and other federal credits	(300)	(363)
Settlements and uncertain tax positions	(787)	166
Other, net	(1,278)	613
Income tax provision	$ 13,565	$ 8,725
Effective income tax rate	15.50%	15.30%

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