CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 134,301	$ 129,730
Restricted cash and cash equivalents	2,718	2,695
Accounts and other receivables, net	11,756	11,929
Inventories, net	21,818	18,348
Receivables from affiliates	7	581
Prepaid expenses and other	1,044	1,401
Total current assets	171,644	164,684
Other assets:
Restricted cash and cash equivalents	25,462	25,445
Note receivable from affiliate	30,500	28,100
Marketable securities	12,552	26,877
Investment in Kronos Worldwide, Inc.	243,840	248,355
Goodwill	27,156	27,156
Other assets, net	5,386	5,860
Total other assets	344,896	361,793
Property and equipment:
Land	4,940	4,940
Buildings	23,054	23,047
Equipment	68,739	67,718
Construction in progress	557	1,002
Property and equipment, gross	97,290	96,707
Less accumulated depreciation	67,364	65,692
Net property and equipment	29,926	31,015
Total assets	546,466	557,492
Current liabilities:
Accounts payable	2,868	3,438
Accrued litigation settlement	11,943	11,830
Accrued and other current liabilities	7,544	10,601
Accrued environmental remediation and related costs	3,132	3,065
Payables to affiliates	757	801
Income taxes	103	73
Total current liabilities	26,347	29,808
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued environmental remediation and related costs	90,701	91,443
Long-term litigation settlement	60,654	60,081
Deferred income taxes	28,092	33,957
Accrued pension costs	7,485	8,230
Other	6,158	6,260
Total noncurrent liabilities	193,590	200,471
NL stockholders' equity:
Common stock	6,098	6,094
Additional paid-in capital	299,093	299,102
Retained earnings	253,597	251,000
Accumulated other comprehensive loss	(255,521)	(251,690)
Total NL stockholders' equity	303,267	304,506
Noncontrolling interest in subsidiary	23,262	22,707
Total equity	326,529	327,213
Total liabilities and equity	546,466	557,492
Commitments and contingencies (Note 14)