CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (8,530)	$ 50,266
Depreciation and amortization	2,009	1,956
Deferred income taxes	(5,957)	9,099
Equity in (earnings) losses of Kronos Worldwide, Inc.	7,153	(31,524)
Dividends received from Kronos Worldwide, Inc.	13,384	13,384
Marketable equity securities	10,959	(19,871)
Loss on pension plan termination	4,911
Benefit plan expense greater than cash funding	355	278
Noncash interest income	(1,839)
Noncash interest expense	374	480
Other, net	199	(32)
Change in assets and liabilities:
Accounts and other receivables, net	2,787	(1,995)
Inventories, net	(2,585)	(7,735)
Prepaid expenses and other	508	(1,249)
Accounts payable and accrued liabilities	(1,777)	663
Accounts with affiliates	622	(115)
Accrued environmental remediation and related costs	(999)	96
Other noncurrent assets and liabilities, net	(646)	(76)
Net cash provided by operating activities	20,928	13,625
Cash flows from investing activities:
Capital expenditures	(478)	(2,215)
Purchases	(49,966)
Proceeds from maturities	26,000
Note receivable from affiliate:
Collections	14,700	12,400
Loans	(13,700)	(10,300)
Other, net		150
Net cash provided by (used in) investing activities	(23,444)	35
Cash flows from financing activities:
Dividends paid	(6,834)	(6,833)
Subsidiary treasury stock acquired		(1,744)
Dividends paid to noncontrolling interests in subsidiary	(778)	(812)
Other, net		(16)
Net cash used in financing activities	(7,612)	(9,405)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(10,128)	4,255
Balance at beginning of year	97,502	175,242
Balance at end of period	87,374	179,497
Supplemental disclosures - cash paid (received) for:
Interest	24	14
Income taxes, net	$ (570)	$ 164