Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amount
Income taxes computed at the federal statutory rate	$ 11,878	$ 9,769	$ 7,155
(Reduction) increase in taxes resulting from:
Statutory depletion in excess of cost depletion	(1,869)	(1,389)	(1,266)
State income taxes, net of federal income tax benefit	557	462	(262)
Disallowed executive compensation	493	456
Other	74	175	222
Income tax expense	$ 11,133	$ 9,473	$ 5,849
Percent of Pretax Income
Income taxes computed at the federal statutory rate (as a percent)	21.00%	21.00%	21.00%
(Reduction) increase in taxes resulting from (as a percent):
Statutory depletion in excess of cost depletion (as a percent)	(3.30%)	(3.00%)	(3.70%)
State income taxes, net of federal income tax benefit (as a percent)	1.00%	1.00%	(0.80%)
Disallowed executive compensation (as a percent)	0.90%	1.00%
Other (as a percent)	0.10%	0.40%	0.70%
Income tax expense (as a percent)	19.70%	20.40%	17.20%
Deferred tax liabilities
Lime and limestone property, plant and equipment	$ 25,703	$ 22,992
Operating lease right-of-use assets	1,238	724
Natural gas interests drilling costs and equipment	259	387
Total	27,200	24,103
Deferred tax assets
Operating lease liabilities	1,276	740
Other	342	308
Total	1,618	1,048
Deferred tax liabilities, net, Total	25,582	23,055
Current income taxes:
Prepaid expenses and other current assets		543
Accrued expenses	237
Current income tax expense	8,606	7,949	$ 1,537
Deferred income tax expense	2,527	1,524	4,312
Income tax expense	11,133	$ 9,473	$ 5,849
Federal
Operating loss carry forwards
Net operating loss carryforwards	$ 0