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Accounts and Other Receivables, Net - Schedule of Accounts Notes Loans and Financing Receivable (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Receivables [Abstract]    
Other receivables $ 98 $ 79
Accrued insurance recoveries 92 138
Total 12,121 8,977
CompX    
Receivables [Abstract]    
Trade receivables 11,953 8,847
Allowance for doubtful accounts (78) $ (87)
Valhi Inc    
Receivables [Abstract]    
Income taxes receivable from Valhi $ 56