CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 13,866	$ 2,502
Depreciation and amortization	949	950
Deferred income taxes	2,498	(3,278)
Equity in earnings of Kronos Worldwide, Inc.	(5,968)	(8,207)
Dividends received from Kronos Worldwide, Inc.	6,339	6,339
Marketable equity securities	(6,360)	12,073
Noncash interest expense	291	342
Benefit plan expense greater (less) than cash funding	(111)	244
Other, net	(101)	(117)
Change in assets and liabilities:
Accounts and other receivables, net	(6,096)	(3,364)
Inventories, net	151	(673)
Prepaid expenses and other	(584)	129
Accounts payable and accrued liabilities	(2,586)	(3,196)
Income taxes	37	15
Accounts with affiliates	284	99
Accrued environmental remediation and related costs	(401)	(269)
Other noncurrent assets and liabilities, net	(130)	(3)
Net cash provided by operating activities	2,078	3,586
Cash flows from investing activities:
Capital expenditures	(568)	(360)
Note receivable from affiliate:
Collections	11,900	18,228
Loans	(11,600)	(15,628)
Net cash provided by (used in) investing activities	(268)	2,240
Cash flows from financing activities:
Dividends paid	(2,927)	(1,950)
Subsidiary treasury stock acquired	(755)
Distributions to noncontrolling interests in subsidiary	(339)	(168)
Net cash used in financing activities	(4,021)	(2,118)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(2,211)	3,708
Balance at beginning of period	165,272	157,870
Balance at end of period	163,061	161,578
Supplemental disclosures - cash paid (received) for:
Interest	6	8
Income taxes, net	$ (1)	$ (9)