Summary of Significant Accounting Policies - Additional Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Additions and write-offs to the company's allowance for doubtful accounts
Beginning balance	$ 450	$ 398
Additions	108	66
Adjustments for expected credit loss factors		(14)
Write-offs	(8)
Ending balance	550	450	$ 398
Lime and limestone inventories:
Raw materials	5,506	3,232
Finished goods	2,951	2,677
Total	8,457	5,909
Service parts inventories	11,122	9,207
Total inventories	19,579	15,116
Supplemental cash flow information
Interest	113	151	152
Income taxes	7,827	9,483	975
Revenue Recognition
External freight billed to customers included in revenue	$ 44,233	$ 34,307	$ 28,373