Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue		$ 666,295	$ 693,524	$ 565,688
Costs and expenses
Cost of sales (exclusive of items shown separately below)		533,293	493,793	332,960
Asset retirement obligations accretion		1,465	1,403	1,115
Depreciation, depletion, and amortization		65,615	54,252	41,194
Selling, general, and administrative		49,286	48,831	40,032
Total costs and expenses		649,659	598,279	415,301
Operating income		16,636	95,245	150,387
Other income (expense), net		4,407	18,321	2,637
Interest expense, net		(6,123)	(8,903)	(6,829)
Income before tax		14,920	104,663	146,195
Income tax expense		3,728	22,350	30,153
Net income		$ 11,192	$ 82,313	$ 116,042
Earnings per common share
Basic (in dollars per share)	[1]	$ 0.11	$ 1.77	$ 2.63
Diluted (in dollars per share)	[1]	$ 0.11	1.73	2.6
Class A Common Stock
Costs and expenses
Net income		$ 4,892
Earnings per common share
Basic (in dollars per share)	[1]	$ 0.11	1.06
Diluted (in dollars per share)	[1]	$ 0.11	1.03
Class B Common Stock
Costs and expenses
Net income		$ 4,288
Earnings per common share
Basic (in dollars per share)	[1]	$ 0.5	0.42
Diluted (in dollars per share)	[1]	$ 0.47	$ 0.4

[1] Refer to Notes 9 and 14 for dividends and earnings per common share information