Reportable Segment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Business segments
Number of business segments | segment			1
Revenues	$ 76,545	$ 73,983	$ 148,232	$ 140,760
Depreciation, depletion and amortization	5,884	5,912	11,863	11,668
Gross profit	34,822	27,131	65,429	51,123
Operating profit (loss)	29,940	22,812	55,699	42,652
Identifiable assets, at period end	484,155	402,372	484,155	402,372	$ 440,602
Capital expenditures	4,396	9,981	11,220	15,432
Operating Segment | Lime and limestone operations
Business segments
Depreciation, depletion and amortization	5,756	5,786	11,613	11,416
Gross profit	34,828	27,121	65,511	51,179
Operating profit (loss)	29,952	22,802	55,788	42,708
Identifiable assets, at period end	255,821	241,953	255,821	241,953
Capital expenditures	4,396	9,981	11,220	15,432
Unallocated corporate assets and cash items
Business segments
Depreciation, depletion and amortization	128	126	250	252
Gross profit	(6)	10	(82)	(56)
Operating profit (loss)	(12)	10	(89)	(56)
Identifiable assets, at period end	228,334	160,419	228,334	160,419
Lime and limestone operations | Operating Segment | Lime and limestone operations
Business segments
Revenues	76,254	73,688	147,724	140,226
Others | Unallocated corporate assets and cash items
Business segments
Revenues	$ 291	$ 295	$ 508	$ 534