CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 129,730	$ 116,259
Restricted cash and cash equivalents	2,695	3,727
Accrued insurance recovery related to litigation settlement		15,000
Accounts and other receivables, net	11,929	12,440
Receivables from affiliates	581	792
Inventories, net	18,348	17,102
Prepaid expenses and other	1,401	1,324
Total current assets	164,684	166,644
Other assets:
Restricted cash and cash equivalents	25,445	1,003
Note receivable from affiliate	28,100	34,000
Marketable securities	26,877	27,740
Investment in Kronos Worldwide, Inc.	248,355	255,565
Goodwill	27,156	27,156
Other assets, net	5,860	3,108
Total other assets	361,793	348,572
Property and equipment:
Land	4,940	5,151
Buildings	23,047	22,842
Equipment	67,718	67,446
Construction in progress	1,002	603
Property and equipment, gross	96,707	96,042
Less accumulated depreciation	65,692	64,016
Net property and equipment	31,015	32,026
Total assets	557,492	547,242
Current liabilities:
Accounts payable	3,438	4,831
Accrued litigation settlement	11,830	60,000
Accrued and other current liabilities	10,601	10,854
Accrued environmental remediation and related costs	3,065	5,027
Payables to affiliates	801	567
Income taxes	73	44
Total current liabilities	29,808	81,323
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued pension costs	8,230	10,389
Accrued environmental remediation and related costs	91,443	93,184
Deferred income taxes	33,957	31,373
Long-term litigation settlement	60,081	17,000
Other	6,260	9,915
Total noncurrent liabilities	200,471	162,361
NL stockholders' equity:
Preferred stock, no par value; 5,000 shares authorized; none issued
Common stock, $.125 par value; 150,000 shares authorized; 48,727 and 48,756 shares issued and outstanding	6,094	6,090
Additional paid-in capital	299,102	301,139
Retained earnings	251,000	225,156
Accumulated other comprehensive loss	(251,690)	(248,270)
Total NL stockholders' equity	304,506	284,115
Noncontrolling interest in subsidiary	22,707	19,443
Total equity	327,213	303,558
Total liabilities and equity	557,492	547,242
Commitments and contingencies (Notes 14 and 17)