CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 19,209	$ 13,866
Depreciation and amortization	961	949
Deferred income taxes	2,688	2,498
Equity in earnings of Kronos Worldwide, Inc.	(17,533)	(5,968)
Dividends received from Kronos Worldwide, Inc.	6,692	6,339
Marketable equity securities	(671)	(6,360)
Noncash interest expense	239	291
Benefit plan expense greater (less) than cash funding	306	(111)
Other, net	(73)	(101)
Change in assets and liabilities:
Accounts and other receivables, net	(2,172)	(6,096)
Inventories, net	(2,490)	151
Prepaid expenses and other	(1,037)	(584)
Accounts payable and accrued liabilities	(2,966)	(2,586)
Income taxes		37
Accounts with affiliates	7	284
Accrued environmental remediation and related costs	(35)	(401)
Other noncurrent assets and liabilities, net	(130)	(130)
Net cash provided by operating activities	2,995	2,078
Cash flows from investing activities:
Capital expenditures	(1,717)	(568)
Note receivable from affiliate:
Collections	7,700	11,900
Loans	(7,100)	(11,600)
Net cash used in investing activities	(1,117)	(268)
Cash flows from financing activities:
Dividends paid	(3,416)	(2,927)
Subsidiary treasury stock acquired		(755)
Dividends paid to noncontrolling interests in subsidiary	(406)	(339)
Net cash used in financing activities	(3,822)	(4,021)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(1,944)	(2,211)
Balance at beginning of year	175,242	165,272
Balance at end of period	173,298	163,061
Supplemental disclosures - cash paid for:
Interest	6	6
Income taxes, net	$ 9	$ (1)