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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net income (loss) $ (1,998) $ 21,247
Depreciation and amortization 851 1,445
Deferred income taxes (11,781) 8,218
Equity in (earnings) loss of Kronos Worldwide, Inc. 12,487 (41,612)
Distributions from Kronos Worldwide, Inc. 5,283 5,283
Benefit plan expense greater (less) than cash funding:    
Securities transactions gains, net (5)  
Other, net 214 70
Change in assets and liabilities:    
Accounts and other receivables, net (1,431) (999)
Inventories, net (734) (9)
Prepaid expenses and other 104 (278)
Accounts payable and accrued liabilities (3,759) (4,255)
Income taxes 2 (1,264)
Accounts with affiliates (1,150) 369
Accrued environmental remediation and related costs 483 12,116
Other noncurrent assets and liabilities, net (490) (1,293)
Net cash used in operating activities (2,225) (1,077)
Cash flows from investing activities:    
Capital expenditures (672) (656)
Change in restricted cash equivalents, net 647 (162)
Collection of note receivable 1,828  
Proceeds from disposal of:    
Assets held for sale 1,559  
Marketable securities 100  
Property, plant and equipment and other assets 2 9
Purchase of marketable securities (95)  
Net cash provided by (used in) investing activities 3,369 (809)
Cash flows from financing activities:    
Cash dividends paid (6,083) (6,083)
Distributions to noncontrolling interests in subsidiary (205) (204)
Indebtedness:    
Borrowings   8,200
Repayments (250) (6,800)
Other, net   (27)
Net cash used in financing activities (6,538) (4,914)
Cash and cash equivalents-net change from:    
Operating, investing and financing activities (5,394) (6,800)
Effect of exchange rate changes on cash   111
Cash and cash equivalents at beginning of period 77,987 11,652
Cash and cash equivalents at end of period 72,593 4,963
Cash paid (received) for:    
Interest 95 218
Income taxes, net 272 1,301
Non-cash investing activity:    
Accrual for capital expenditures (233) 311
Defined Benefit Pension Plans [Member]
    
Benefit plan expense greater (less) than cash funding:    
Defined benefit pension plans (119) 45
OPEB [Member]
    
Benefit plan expense greater (less) than cash funding:    
Defined benefit pension plans $ (182) $ (160)