CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 128,582	$ 116,259
Restricted cash and cash equivalents	2,980	3,727
Accrued insurance recovery related to litigation settlement		15,000
Accounts and other receivables, net	15,178	12,440
Inventories, net	17,830	17,102
Receivable from affiliate	7	792
Prepaid expenses and other	1,088	1,324
Total current assets	165,665	166,644
Other assets:
Notes receivable from affiliate	40,000	34,000
Marketable securities	42,688	27,740
Investment in Kronos Worldwide, Inc.	264,118	255,565
Goodwill	27,156	27,156
Accrued insurance recovery related to litigation settlement	15,575
Other assets, net	3,915	4,111
Total other assets	393,452	348,572
Property and equipment:
Land	5,151	5,151
Buildings	22,813	22,842
Equipment	67,633	67,446
Construction in progress	662	603
Property and equipment, gross	96,259	96,042
Less accumulated depreciation	64,541	64,016
Net property and equipment	31,718	32,026
Total assets	590,835	547,242
Current liabilities:
Accounts payable	3,688	4,831
Accrued litigation settlement	25,000	60,000
Accrued and other current liabilities	8,942	10,854
Accrued environmental remediation and related costs	4,744	5,027
Payable to affiliates	567	567
Income taxes	48	44
Total current liabilities	42,989	81,323
Noncurrent liabilities:
Long-term debt from affiliate	500	500
Accrued pension costs	9,851	10,389
Accrued environmental remediation and related costs	92,057	93,184
Long-term litigation settlement	71,571	17,000
Deferred income taxes	35,447	31,373
Other	9,794	9,915
Total noncurrent liabilities	219,220	162,361
NL stockholders' equity:
Common stock	6,094	6,090
Additional paid-in capital	299,404	301,139
Retained earnings	246,238	225,156
Accumulated other comprehensive loss	(245,065)	(248,270)
Total NL stockholders' equity	306,671	284,115
Noncontrolling interest in subsidiary	21,955	19,443
Total equity	328,626	303,558
Total liabilities and equity	590,835	547,242
Commitments and contingencies (Note 14)