CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ 16,693	$ (22,716)	$ 29,630
Depreciation and amortization	3,774	3,609	3,601
Deferred income taxes	(4,330)	(24,030)	4,167
Provision for inventory reserves	161	233	24
Cash funding of benefit plans in excess of net benefit plan expense	(277)	(1,349)	(2,557)
Equity in losses (earnings) of Kronos Worldwide, Inc.	(13,171)	52,770	(30,161)
Dividends received from Kronos Worldwide, Inc.	21,132	21,132	21,132
Other, net	201	188	194
Change in assets and liabilities:
Accounts and other receivables, net	(1,601)	246	1,220
Inventories, net	(37)	1,532	(3,652)
Prepaid expenses and other	(5)	(189)	18
Accounts payable and accrued liabilities	(172)	(1,721)	2,855
Income taxes	18	(2)	5
Accounts with affiliates	2,075	(439)	726
Accrued environmental remediation and related costs	3,526	3,118	(3,621)
Other noncurrent assets and liabilities, net	(288)	(4,746)	(29)
Net cash provided by operating activities	27,699	27,636	23,552
Cash flows from investing activities:
Capital expenditures	(3,206)	(4,304)	(2,858)
Promissory notes receivable from affiliate:
Loans	(36,600)
Collections	9,200
Purchase of marketable securities		(251)	(643)
Proceeds from the disposal of marketable securities		255	660
Other			(47)
Net cash used in investing activities	(30,606)	(4,300)	(2,888)
Cash flows from financing activities:
Distributions to noncontrolling interests in subsidiary	(332)	(330)	(328)
Indebtedness - borrowings from affiliate	500
Net cash provided by (used in) financing activities	168	(330)	(328)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(2,739)	23,006	20,336
Balance at beginning of year	100,981	77,975	57,639
Balance at end of year	98,242	100,981	77,975
Cash paid for:
Interest	4
Income taxes, net	$ 70	$ 611	$ 193