CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 28,035	$ (39,013)	$ 117,826
Depreciation and amortization	3,685	3,476	3,734
Deferred income taxes	430	(15,178)	(603)
Equity in earnings of Kronos Worldwide, Inc.	(26,470)	(62,316)	(107,785)
Dividends received from Kronos Worldwide, Inc.	25,356	23,948	21,132
Net gain from sale of excess property	(4,424)
Net gain from sale of business	(3,000)
Cash funding of benefit plans in excess of net benefit plan expense	(1,574)	(1,875)	(603)
Marketable equity securities	863	60,941
Other, net	927	(2)	283
Change in assets and liabilities:
Accounts and other receivables, net	15,487	(16,786)	(117)
Inventories, net	(1,439)	(1,846)	(473)
Prepaid expenses and other	(77)	(162)	(177)
Accounts payable and accrued liabilities	(26,365)	61,769	(1,700)
Income taxes	33	16	7
Accounts with affiliates	444	1,113	(3,041)
Accrued environmental remediation and related costs	(3,703)	(13,698)	(4,749)
Other noncurrent assets and liabilities, net	19,227	16,689	(5,096)
Net cash provided by operating activities	27,435	17,076	18,638
Cash flows from investing activities:
Capital expenditures	(3,166)	(3,118)	(2,810)
Note receivable from affiliate:
Loans	(34,900)	(46,800)	(52,100)
Collections	40,800	51,000	41,300
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	125	225	4
Net cash provided by (used in) investing activities	9,916	1,307	(13,606)
Cash flows from financing activities -
Distributions to noncontrolling interests in subsidiary	(470)	(335)	(333)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	36,881	18,048	4,699
Balance at beginning of year	120,989	102,941	98,242
Balance at end of year	157,870	120,989	102,941
Supplemental disclosures - Cash paid for (received):
Interest	36	34	30
Income taxes, net	(118)	$ (1,716)	$ 3,109
Noncash investing - receivable from sale of business	$ 325