CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 29,630us-gaap_ProfitLoss	$ (54,543)us-gaap_ProfitLoss	$ 79,082us-gaap_ProfitLoss
Depreciation and amortization	3,601	3,335	5,826
Deferred income taxes	4,167us-gaap_DeferredIncomeTaxExpenseBenefit	(41,891)us-gaap_DeferredIncomeTaxExpenseBenefit	27,433us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for inventory reserves	24us-gaap_InventoryWriteDown	228us-gaap_InventoryWriteDown	454us-gaap_InventoryWriteDown
Cash funding of benefit plans in excess of net benefit plan expense	(2,557)	(1,224)	(431)
Equity in (earnings) loss of Kronos Worldwide, Inc.	(30,161)	31,007	(66,437)
Dividends received from Kronos Worldwide, Inc.	21,132	21,132	21,132
Net gains from:
Real estate-related litigation settlement			(14,964)
Securities transactions, net	(16)us-gaap_MarketableSecuritiesGainLoss	(11)us-gaap_MarketableSecuritiesGainLoss	(16,567)us-gaap_MarketableSecuritiesGainLoss
Sale of business unit			(23,674)
Reversal of accrued contingent consideration			(778)
Goodwill impairment			6,406us-gaap_GoodwillImpairmentLoss
Assets held for sale write-down			1,162
Other, net	210us-gaap_OtherNoncashIncomeExpense	81us-gaap_OtherNoncashIncomeExpense	(3,103)us-gaap_OtherNoncashIncomeExpense
Change in assets and liabilities:
Accounts and other receivables, net	1,220	(1,461)	(476)
Inventories, net	(3,652)us-gaap_IncreaseDecreaseInInventories	(2,240)us-gaap_IncreaseDecreaseInInventories	174us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other	18	166	(1,871)
Accounts payable and accrued liabilities	2,855	(3,347)	1,550
Income taxes	5		(1,450)
Accounts with affiliates	726	(369)	729
Accrued environmental remediation and related costs	(3,621)	65,630	6,369
Other noncurrent assets and liabilities, net	(29)	(1,588)	(2,566)
Net cash provided by operating activities	23,552	14,905	18,000
Cash flows from investing activities:
Capital expenditures	(2,858)	(3,541)	(4,564)
Proceeds from real estate-related litigation settlement			15,603us-gaap_ProceedsFromLegalSettlements
Collection of promissory note receivable		3,034
Change in restricted cash equivalents, net	(384)	2,018	(2,159)
Net proceeds from the disposal of:
Assets held for sale		1,559	3,555
Marketable securities	660	272	24,146
Property, plant and equipment and other assets		5	3,290
Proceeds from disposal of operations			58,027
Cash of disposed business unit			(5,426)us-gaap_CashDivestedFromDeconsolidation
Purchase of marketable securities	(643)	(261)	(227)
Other	(48)	(102)
Net cash provided by (used in) investing activities	(3,273)	2,984	92,245
Cash flows from financing activities:
Cash dividends paid		(24,336)us-gaap_PaymentsOfDividendsCommonStock	(24,333)us-gaap_PaymentsOfDividendsCommonStock
Distributions to noncontrolling interests in subsidiary	(328)	(451)	(818)
Indebtedness:
Borrowings			40,550us-gaap_ProceedsFromOtherDebt
Repayments		(18,480)us-gaap_RepaymentsOfDebt	(59,406)us-gaap_RepaymentsOfDebt
Deferred financing costs paid			(79)us-gaap_PaymentsOfFinancingCosts
Net cash used in financing activities	(328)	(43,267)	(44,086)
Cash and cash equivalents - net change from:
Operating, investing and financing activities	19,951	(25,378)	66,159
Effect of exchange rate changes on cash			176
Net change for the year	19,951	(25,378)	66,335
Balance at beginning of year	52,609	77,987	11,652
Balance at end of year	72,560	52,609	77,987
Cash paid for:
Interest		222us-gaap_InterestPaid	982us-gaap_InterestPaid
Income taxes, net	193us-gaap_IncomeTaxesPaidNet	302us-gaap_IncomeTaxesPaidNet	2,525us-gaap_IncomeTaxesPaidNet
Non-cash investing and financing activities - accrual for capital expenditures	$ (34)	$ (313)	$ 484

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