CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 53,360	$ 16,103	$ 28,035
Depreciation and amortization	3,839	3,827	3,685
Deferred income taxes	7,453	(2,530)	430
Equity in earnings of Kronos Worldwide, Inc.	(34,323)	(19,437)	(26,470)
Dividends received from Kronos Worldwide, Inc.	25,356	25,356	25,356
Marketable equity securities	(16,229)	8,671	863
Cash funding of benefit plans in excess of net benefit plan expense	(220)	(792)	(1,574)
Noncash interest expense	1,116	1,321	646
Net gain from sale of excess property			(4,424)
Net gain from sale of business			(3,000)
Other, net	(31)	93	281
Change in assets and liabilities:
Accounts and other receivables, net	(4,488)	1,121	15,487
Inventories, net	(7,479)	(193)	(1,439)
Prepaid expenses and other	(991)	(237)	(77)
Accounts payable and accrued liabilities	(9,399)	(13,163)	(26,365)
Income taxes	13	(77)	33
Accounts with affiliates	279	193	444
Accrued environmental remediation and related costs	(476)	(1,092)	(3,703)
Other noncurrent assets and liabilities, net	(171)	(141)	19,227
Net cash provided by operating activities	17,609	19,023	27,435
Cash flows from investing activities:
Capital expenditures	(4,094)	(1,740)	(3,166)
Note receivable from affiliate:
Loans	(29,800)	(34,828)	(34,900)
Collections	40,600	33,428	40,800
Proceeds from sale of excess property			4,636
Proceeds from sale of business			2,925
Cash, cash equivalents and restricted cash and cash equivalents of business at time of sale			(504)
Other	2		125
Net cash provided by (used in) investing activities	6,708	(3,140)	9,916
Cash flows from financing activities:
Dividends paid	(11,712)	(7,805)
Subsidiary treasury stock acquired	(1,311)
Dividends paid to noncontrolling interests in subsidiary	(1,324)	(676)	(470)
Net cash used in financing activities	(14,347)	(8,481)	(470)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	9,970	7,402	36,881
Balance at beginning of year	165,272	157,870	120,989
Balance at end of year	175,242	165,272	157,870
Supplemental disclosures - cash paid for:
Interest	26	27	36
Income taxes, net	$ 32	$ 46	(118)
Noncash investing - receivable from sale of business			$ 325