Temporary tax differences (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Property and equipment	$ 42,317	$ 41,866	$ 38,143
Investment in opportunity zone	34,966	34,871	30,846
Depletion	706	697	704
Unrealized rents	385	150	58
Prepaid expenses and other	256	31	36
Gross deferred tax liabilities	78,630	77,615	69,787
Federal tax loss carryforwards	3,153	6,375	3,235
State tax loss carryforwards	6,012	2,359	1,388
Employee benefits and other	9	921	1,117
Gross deferred tax assets	9,174	9,655	5,740
Net deferred tax liability	$ 69,456	$ 67,960	$ 64,047