CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 145,960	$ 111,522
Restricted cash and cash equivalents	29,734	2,917
Marketable securities		53,149
Accounts and other receivables, net	14,582	17,101
Receivables from affiliates		628
Inventories, net	28,008	30,712
Prepaid expenses and other	7,293	2,235
Total current assets	225,577	218,264
Other assets:
Restricted cash and cash equivalents	530	26,943
Note receivable from affiliate	7,900	10,600
Marketable securities	39,969	18,194
Investment in Kronos Worldwide, Inc.	259,556	247,582
Goodwill	27,156	27,156
Other assets, net	701	2,060
Total other assets	335,812	332,535
Property and equipment:
Land	5,390	5,390
Buildings	23,262	23,239
Equipment	75,334	74,315
Construction in progress	527	676
Property and equipment, gross	104,513	103,620
Less accumulated depreciation	80,252	77,757
Net property and equipment	24,261	25,863
Total assets	585,650	576,662
Current liabilities:
Accounts payable	3,291	3,148
Accrued litigation settlement	16,353	11,830
Accrued and other current liabilities	10,642	13,182
Accrued environmental remediation and related costs	2,462	1,655
Payables to affiliates	818	634
Total current liabilities	33,566	30,449
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued environmental remediation and related costs	89,163	89,451
Long-term litigation settlement		16,122
Deferred income taxes	51,784	41,733
Accrued pension costs	624	1,571
Other	5,083	5,074
Total noncurrent liabilities	147,154	154,451
NL stockholders' equity:
Preferred stock
Common stock	6,105	6,103
Additional paid-in capital	299,099	298,868
Retained earnings	302,420	284,462
Accumulated other comprehensive loss	(221,587)	(219,621)
Total NL stockholders' equity	386,037	369,812
Noncontrolling interest in subsidiary	18,893	21,950
Total equity	404,930	391,762
Total liabilities and equity	585,650	576,662
Commitments and contingencies (Notes 11 and 13)