CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 127,951	$ 147,002
Restricted cash and cash equivalents	2,827	2,765
Accounts and other receivables, net	19,219	15,609
Inventories, net	33,337	25,642
Prepaid expenses and other	2,677	2,630
Total current assets	186,011	193,648
Other assets:
Restricted cash and cash equivalents	25,460	25,475
Note receivable from affiliate	14,700	18,700
Marketable securities	30,135	34,435
Investment in Kronos Worldwide, Inc.	268,335	264,803
Goodwill	27,156	27,156
Other assets, net	2,550	2,753
Total other assets	368,336	373,322
Property and equipment:
Land	5,071	5,071
Buildings	23,181	23,161
Equipment	73,738	70,664
Construction in progress	834	2,028
Property and equipment, gross	102,824	100,924
Less accumulated depreciation	73,763	71,742
Net property and equipment	29,061	29,182
Total assets	583,408	596,152
Current liabilities:
Accounts payable	5,171	3,408
Accrued litigation settlement	11,774	11,830
Accrued and other current liabilities	11,671	12,025
Accrued environmental remediation and related costs	2,728	2,643
Payables to affiliates	682	691
Total current liabilities	32,026	30,597
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued environmental remediation and related costs	89,814	90,297
Long-term litigation settlement	27,298	38,519
Deferred income taxes	44,794	44,056
Accrued pension costs	2,234	3,722
Other	3,195	3,490
Total noncurrent liabilities	167,835	180,584
NL stockholders' equity:
Common stock	6,101	6,100
Additional paid-in capital	298,932	299,775
Retained earnings	309,920	297,351
Accumulated other comprehensive loss	(251,786)	(240,756)
Total NL stockholders' equity	363,167	362,470
Noncontrolling interest in subsidiary	20,380	22,501
Total equity	383,547	384,971
Total liabilities and equity	583,408	596,152
Commitments and contingencies (Notes 12 and 14)