CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net earnings (loss)	$ 50,931	$ (48,190)	$ 17,656	$ (25,611)
Adjustments to reconcile net earnings (loss) to operating cash flows:
Depreciation, depletion, and amortization	10,272	9,122	20,529	19,175
Provision for deferred income taxes			11,254	(11,656)
Asset impairments	1,251	1,000	1,251	1,107
Gains on sale of assets			(11,032)	(19,618)
Investment and investment partnership gains and losses			(10,252)	58,921
Distributions from investment partnerships			35,000	1,000
Changes in receivables, inventories and other assets			559	1,234
Changes in accounts payable and accrued expenses			(7,023)	(3,642)
Net cash provided by operating activities			57,942	20,910
Investing activities
Capital expenditures			(10,004)	(16,429)
Proceeds from property and equipment disposals			12,477	21,820
Purchases of interests in limited partnerships			(30,065)	(22,924)
Purchases of investments			(31,479)	(43,152)
Sales of investments and redemptions of fixed maturity securities			31,910	41,099
Net cash used in investing activities			(27,161)	(19,586)
Financing activities
Proceeds from line of credit			27,000	6,050
Payments on line of credit			(53,000)	(6,000)
Principal payments on direct financing lease obligations			(2,778)	(2,741)
Net cash used in financing activities			(28,778)	(2,691)
Effect of exchange rate changes on cash			42	(7)
Increase (decrease) in cash, cash equivalents and restricted cash			2,045	(1,374)
Cash, cash equivalents and restricted cash at beginning of year			31,432	29,654
Cash, cash equivalents and restricted cash at end of second quarter	33,477	28,280	33,477	28,280
Cash and cash equivalents	32,766	26,897	32,766	26,897
Restricted cash in other long-term assets	711	1,383	711	1,383
Cash, cash equivalents and restricted cash at end of second quarter	$ 33,477	$ 28,280	$ 33,477	$ 28,280