CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ (39,013)	$ 117,826	$ 16,693
Depreciation and amortization	3,476	3,734	3,774
Deferred income taxes	(15,178)	(603)	(4,330)
Cash funding of benefit plans in excess of net benefit plan expense	(1,875)	(603)	(277)
Equity in losses (earnings) of Kronos Worldwide, Inc.	(62,316)	(107,785)	(13,171)
Marketable equity securities	60,941
Dividends received from Kronos Worldwide, Inc.	23,948	21,132	21,132
Other, net	(2)	283	362
Change in assets and liabilities:
Accounts and other receivables, net	(16,786)	(117)	(1,601)
Inventories, net	(1,846)	(473)	(37)
Prepaid expenses and other	(162)	(177)	(5)
Accounts payable and accrued liabilities	61,769	(1,700)	(172)
Income taxes	16	7	18
Accounts with affiliates	1,113	(3,041)	2,075
Accrued environmental remediation and related costs	(13,698)	(4,749)	3,526
Other noncurrent assets and liabilities, net	16,689	(5,096)	(288)
Net cash provided by operating activities	17,076	18,638	27,699
Cash flows from investing activities:
Capital expenditures	(3,118)	(2,810)	(3,206)
Promissory notes receivable from affiliate:
Loans	(46,800)	(52,100)	(36,600)
Collections	51,000	41,300	9,200
Other	225	4
Net cash provided by (used in) investing activities	1,307	(13,606)	(30,606)
Cash flows from financing activities:
Distributions to noncontrolling interests in subsidiary	(335)	(333)	(332)
Indebtedness - borrowings from affiliate			500
Net cash provided by (used in) financing activities	(335)	(333)	168
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	18,048	4,699	(2,739)
Balance at beginning of year	102,941	98,242	100,981
Balance at end of year	120,989	102,941	98,242
Cash paid for (received):
Interest	34	30	4
Income taxes, net	$ (1,716)	$ 3,109	$ 70