Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 7,004	$ 15,461
Restricted cash and cash equivalents	6,611	7,413
Marketable securities		9
Accounts and other receivables, net	34,729	31,663
Inventories, net	20,656	18,424
Prepaid expenses and other	2,408	1,285
Deferred income taxes	7,607	7,724
Total current assets	79,015	81,979
Other assets:
Marketable equity securities	264,650	130,824
Investment in Kronos Worldwide, Inc.	257,976	231,693
Goodwill	44,913	44,819
Assets held for sale	2,419	2,415
Other, net	1,223	1,447
Total other assets	571,181	411,198
Property and equipment:
Land	13,074	12,963
Buildings	35,433	34,981
Equipment	130,703	129,260
Construction in progress	1,483	965
Property and equipment, gross	180,693	178,169
Less accumulated depreciation	121,711	117,621
Net property and equipment	58,982	60,548
Total assets	709,178	553,725
LIABILITIES AND EQUITY
Current maturities of long-term debt	11,000	10,000
Accounts payable	7,693	9,179
Accrued and other current liabilities	12,738	16,940
Accrued environmental remediation and related costs	10,852	8,206
Income taxes	1,791	909
Total current liabilities	44,074	45,234
Non-current liabilities:
Long-term debt	45,730	64,530
Accrued pension costs	7,666	8,550
Accrued postretirement benefit (OPEB) costs	5,305	5,459
Accrued environmental remediation and related costs	36,392	32,194
Deferred income taxes	172,184	115,206
Other	18,559	18,697
Total non-current liabilities	285,836	244,636
NL Stockholders' equity:
Common stock	6,082	6,078
Additional paid-in capital	300,020	299,469
Retained earnings	78,150	56,229
Accumulated other comprehensive loss	(16,303)	(108,827)
Total NL stockholders' equity	367,949	252,949
Noncontrolling interest in subsidiary	11,319	10,906
Total equity	379,268	263,855
Total liabilities and equity	709,178	553,725
Commitments and contingencies (Notes 11 and 12)