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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:      
Net income (loss) $ 16,103 $ 28,035 $ (39,013)
Depreciation and amortization 3,827 3,685 3,476
Deferred income taxes (2,530) 430 (15,178)
Equity in earnings of Kronos Worldwide, Inc. (19,437) (26,470) (62,316)
Dividends received from Kronos Worldwide, Inc. 25,356 25,356 23,948
Marketable equity securities 8,671 863 60,941
Cash funding of benefit plans in excess of net benefit plan expense (792) (1,574) (1,875)
Noncash interest expense 1,321 646  
Net gain from sale of excess property   (4,424)  
Net gain from sale of business   (3,000)  
Other, net 93 281 (2)
Change in assets and liabilities:      
Accounts and other receivables, net 1,121 15,487 (16,786)
Inventories, net (193) (1,439) (1,846)
Prepaid expenses and other (237) (77) (162)
Accounts payable and accrued liabilities (13,163) (26,365) 61,769
Income taxes (77) 33 16
Accounts with affiliates 193 444 1,113
Accrued environmental remediation and related costs (1,092) (3,703) (13,698)
Other noncurrent assets and liabilities, net (141) 19,227 16,689
Net cash provided by operating activities 19,023 27,435 17,076
Cash flows from investing activities:      
Capital expenditures (1,740) (3,166) (3,118)
Note receivable from affiliate:      
Loans (34,828) (34,900) (46,800)
Collections 33,428 40,800 51,000
Proceeds from sale of excess property   4,636  
Proceeds from sale of business   2,925  
Cash, cash equivalents and restricted cash and cash equivalents of business at time of sale   (504)  
Other   125 225
Net cash provided by (used in) investing activities (3,140) 9,916 1,307
Cash flows from financing activities:      
Dividends paid (7,805)    
Distributions to noncontrolling interests in subsidiary (676) (470) (335)
Net cash used in financing activities (8,481) (470) (335)
Net cash provided by operating activities 19,023 27,435 17,076
Net cash provided by (used in) investing activities (3,140) 9,916 1,307
Net cash used in financing activities (8,481) (470) (335)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:      
Operating, investing and financing activities 7,402 36,881 18,048
Balance at beginning of year 157,870 120,989 102,941
Balance at end of year 165,272 157,870 120,989
Supplemental disclosures:      
Interest 27 36 34
Income taxes, net $ 46 (118) $ (1,716)
Noncash investing - receivable from sale of business   $ 325