CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 93,162	$ 96,462
Restricted cash and cash equivalents	3,791	3,246
Accounts and other receivables, net	10,586	8,977
Inventories, net	14,974	15,098
Prepaid expenses and other	986	981
Total current assets	123,499	124,764
Other assets:
Note receivable from affiliate	27,400
Marketable securities	49,731	19,260
Investment in Kronos Worldwide, Inc.	120,346	140,695
Goodwill	27,156	27,156
Other assets, net	3,276	3,331
Deferred income taxes		11
Total other assets	227,909	190,453
Property and equipment:
Land	5,146	5,138
Buildings	22,811	21,502
Equipment	66,112	64,051
Construction in progress	1,098	1,567
Property and equipment, gross	95,167	92,258
Less accumulated depreciation	61,583	58,152
Net property and equipment	33,584	34,106
Total assets	384,992	349,323
Current liabilities:
Accounts payable	5,026	4,557
Accrued and other current liabilities	10,624	10,558
Accrued environmental remediation and related costs	13,350	8,668
Payable to affiliates	1,717	220
Income taxes	26	5
Total current liabilities	30,743	24,008
Noncurrent liabilities:
Long-term debt from affiliate	500
Accrued pension cost	12,874	14,155
Accrued postretirement benefits (OPEB) costs	2,310	2,773
Accrued environmental remediation and related costs	103,308	104,465
Deferred income taxes	27,445	25,035
Other	13,542	13,636
Total noncurrent liabilities	159,979	160,064
NL stockholders' equity:
Preferred stock, no par value; 5,000 shares authorized; none issued
Common stock, $.125 par value; 150,000 shares authorized; 48,692 and 48,706 shares issued and outstanding	6,088	6,086
Additional paid-in capital	300,674	300,543
Retained earnings	104,004	88,679
Accumulated other comprehensive loss	(232,846)	(245,358)
Total NL stockholders' equity	177,920	149,950
Noncontrolling interest in subsidiary	16,350	15,301
Total equity	194,270	165,251
Total liabilities and equity	384,992	349,323
Commitments and contingencies (Notes 14 and 17)