CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 15,726	$ 14,735
Depreciation and amortization	901	889
Deferred income taxes	2,552	3,420
Equity in earnings of Kronos Worldwide, Inc.	(9,225)	(21,479)
Marketable equity securities	(5,462)	1,581
Dividends received from Kronos Worldwide, Inc.	6,339	5,987
Cash funding of benefit plans in excess of net benefit plan expense	9	(120)
Other, net	39	56
Change in assets and liabilities:
Accounts and other receivables, net	(3,244)	(2,226)
Inventories, net	(1,475)	(980)
Prepaid expenses and other	181	(819)
Accounts payable and accrued liabilities	(3,949)	(2,867)
Income taxes	9	16
Accounts with affiliates	559	(132)
Accrued environmental remediation and related costs	(1,194)	3,848
Other noncurrent assets and liabilities, net	(16)	(66)
Net cash provided by operating activities	1,750	1,843
Cash flows from investing activities:
Capital expenditures	(439)	(644)
Promissory notes receivable from affiliate:
Loans	(17,400)	(12,400)
Collections	11,400	12,600
Other, net		224
Net cash used in investing activities	(6,439)	(220)
Cash flows from financing activities -
Distributions to noncontrolling interests in subsidiary	(117)	(83)
Cash and cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(4,806)	1,540
Balance at beginning of period	120,989	102,941
Balance at end of period	116,183	104,481
Supplemental disclosure - cash paid (received) for:
Interest	9	8
Income taxes, net	$ (16)	$ 25