CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 50,266	$ 27,171
Depreciation and amortization	1,956	1,900
Deferred income taxes	9,099	4,359
Equity in earnings of Kronos Worldwide, Inc.	(31,524)	(13,784)
Dividends received from Kronos Worldwide, Inc.	13,384	12,678
Marketable equity securities	(19,871)	(10,935)
Noncash interest expense	480	584
Benefit plan expense greater (less) than cash funding	278	(191)
Other, net	(32)	26
Change in assets and liabilities:
Accounts and other receivables, net	(1,995)	(5,559)
Inventories, net	(7,735)	(1,691)
Prepaid expenses and other	(1,249)	(355)
Accounts payable and accrued liabilities	663	(367)
Accounts with affiliates	(115)	327
Accrued environmental remediation and related costs	96	(506)
Other noncurrent assets and liabilities, net	(76)	(43)
Net cash provided by operating activities	13,625	13,614
Cash flows from investing activities:
Capital expenditures	(2,215)	(1,598)
Note receivable from affiliate:
Collections	12,400	22,200
Loans	(10,300)	(18,700)
Other, net	150
Net cash provided by investing activities	35	1,902
Cash flows from financing activities:
Dividends paid	(6,833)	(5,855)
Subsidiary treasury stock acquired	(1,744)	(755)
Dividends paid to noncontrolling interests in subsidiary	(812)	(669)
Other, net	(16)
Net cash used in financing activities	(9,405)	(7,279)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	4,255	8,237
Balance at beginning of period	175,242	165,272
Balance at end of period	179,497	173,509
Supplemental disclosures - cash paid for:
Interest	14	13
Income taxes, net	$ 164	$ 34