CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income	$ 27,171	$ 7,374
Depreciation and amortization	1,900	1,912
Deferred income taxes	4,359	(4,805)
Equity in earnings of Kronos Worldwide, Inc.	(13,784)	(13,858)
Dividends received from Kronos Worldwide, Inc.	12,678	12,678
Marketable equity securities	(10,935)	14,325
Noncash interest expense	584	686
Benefit plan expense greater (less) than cash funding	(191)	202
Other, net	26	42
Change in assets and liabilities:
Accounts and other receivables, net	(5,559)	496
Inventories, net	(1,691)	(3,555)
Prepaid expenses and other	(355)	358
Accounts payable and accrued liabilities	(366)	(3,592)
Income taxes	(1)	27
Accounts with affiliates	327	530
Accrued environmental remediation and related costs	(506)	(675)
Other noncurrent assets and liabilities, net	(43)	(33)
Net cash provided by operating activities	13,614	12,112
Cash flows from investing activities:
Capital expenditures	(1,598)	(861)
Note receivable from affiliate:
Collections	22,200	20,628
Loans	(18,700)	(23,028)
Net cash provided by (used in) investing activities	1,902	(3,261)
Cash flows from financing activities:
Dividends paid	(5,855)	(3,902)
Subsidiary treasury stock acquired	(755)
Distributions to noncontrolling interests in subsidiary	(669)	(338)
Net cash used in financing activities	(7,279)	(4,240)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	8,237	4,611
Balance at beginning of period	165,272	157,870
Balance at end of period	173,509	162,481
Supplemental disclosures - cash paid (received) for:
Interest	13	14
Income taxes, net	$ 34	$ (9)