Related Party Transactions - Additional Information (Detail) - USD ($) |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Jan. 30, 2010 |
|
| Valhi | Unsecured Revolving Promissory Note | |||||
| Related Party Transaction [Line Items] | |||||
| Borrowing under credit facility | $ 40,000,000 | $ 40,000,000 | |||
| Outstanding borrowings | 0 | $ 0 | $ 0 | ||
| Contran | Combined Information Technology Data Recovery Program | |||||
| Related Party Transaction [Line Items] | |||||
| Expense transaction with affiliate | 180,000 | 145,000 | 110,000 | ||
| Contran | Intercorporate Services Agreement Fees | |||||
| Related Party Transaction [Line Items] | |||||
| Expense transaction with affiliate | 23,300,000 | 21,900,000 | 24,100,000 | ||
| Contran | Intercorporate Services Agreement Fees | Scenario Forecast | |||||
| Related Party Transaction [Line Items] | |||||
| Expense transaction with affiliate | $ 24,500,000 | ||||
| Tall Pines and EWI | Insurance Premiums | |||||
| Related Party Transaction [Line Items] | |||||
| Expense transaction with affiliate | $ 12,200,000 | $ 12,000,000 | $ 12,700,000 | ||