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Fair Value Measurements and Financial Instruments - Additional Information (Detail) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) NOK / € NOK / $ CAD / $ | Mar. 31, 2016 EUR (€) NOK / € NOK / $ CAD / $ | Dec. 31, 2015 USD ($)
Financial Instrument At Fair Value [Line Items] |  |  |
Estimated fair value of currency forward contracts | $ (100,000) |  | $ (1,200,000)
Fair value of interest rate swap contract, current and noncurrent | 8,000,000 |  | 3,500,000
Marketable securities | 254,600,000 |  | 254,900,000
Interest Rate Swap |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Fair value of interest rate swap contract, current | 3,400,000 |  | 3,300,000
Fair value of interest rate swap contract, noncurrent | 4,600,000 |  | 200,000
Accounts and other receivables |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Estimated fair value of currency forward contracts | 100,000 |  |
Accounts payable and accrued liabilities |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Estimated fair value of currency forward contracts | 200,000 |  |
Kronos Worldwide, Inc. | 2014 Term Loan |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Estimated market price of the notes | 888.75 |  | 900
Principal amount of debt instrument | 1,000 |  | 1,000
Kronos Worldwide, Inc. | Interest Rate Swap | Libor Rate |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Notional amount currency forward contract | $ 343,000,000 |  | $ 344,750,000
Derivative maturity date | Feb. 29, 2020 |  |
Derivative, type of instrument | pay-fixed/receive-variable interest rate swap |  |
Interest rate swap, type of interest rate | fixed |  |
Interest rate swap, fixed rate | 2.016% | 2.016% |
Interest rate swap, floor rate | 1.00% | 1.00% |
Interest rate swap, inception date | Aug. 07, 2015 |  |
Interest rate swap, effective date | Sep. 30, 2015 |  |
Interest rate swap, notional amount decline each quarter | $ 875,000 |  |
Interest rate swap, notional amount decline commencing date | Dec. 31, 2015 |  |
Interest rate swap, gains or losses representing hedge ineffectiveness | $ 0 |  |
Pretax loss amount recognized in other comprehensive income (loss) related to interest rate swap contract | 4,500,000 |  |
Reclassified from accumulated other comprehensive income (loss) in to interest expense | 900,000 |  |
Accumulated other comprehensive income (loss) expected to be reclassified to interest expense in next twelve months | 3,500,000 |  |
Fair value of interest rate swap contract, current and noncurrent | 8,000,000 |  |
Kronos Worldwide, Inc. | Accounts payable and accrued liabilities | Interest Rate Swap | Libor Rate |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Fair value of interest rate swap contract, current | 3,400,000 |  |
Kronos Worldwide, Inc. | Other Noncurrent Liabilities | Interest Rate Swap | Libor Rate |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Fair value of interest rate swap contract, noncurrent | 4,600,000 |  |
Amalgamated Sugar Company LLC |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Marketable securities | 250,000,000 |  |
Forward Contracts | Kronos Worldwide, Inc. |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Estimated fair value of currency forward contracts | 100,000 |  |
Currency transaction loss | 100,000 |  |
Canadian | Forward Contracts | Kronos Worldwide, Inc. |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Notional amount currency forward contract | $ 24,700,000 |  |
Exchange rate | CAD / $ | 1.29 | 1.29 |
Canadian | Forward Contracts | Kronos Worldwide, Inc. | April 2016 through July 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Maturity rate of derivative | $ 3,100,000 |  |
Canadian | Forward Contracts | Kronos Worldwide, Inc. | August 2016 through December 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Maturity rate of derivative | 2,500,000 |  |
Chemicals | Norwegian Kroner | Forward Contracts |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Notional amount currency forward contract | 19,400,000 |  |
Maturity rate of derivative | $ 2,200,000 |  |
Chemicals | Norwegian Kroner | Forward Contracts | Euro |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Notional amount currency forward contract | € |  | € 14,600,000 |
Maturity rate of derivative | € |  | € 1,600,000 |
Minimum | Canadian | Forward Contracts | Kronos Worldwide, Inc. | April 2016 through July 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Derivative maturity date | Apr. 30, 2016 |  |
Minimum | Canadian | Forward Contracts | Kronos Worldwide, Inc. | August 2016 through December 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Derivative maturity date | Aug. 31, 2016 |  |
Minimum | Chemicals | Norwegian Kroner | Forward Contracts |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Exchange rate | NOK / $ | 8.31 | 8.31 |
Derivative maturity date | Apr. 30, 2016 |  |
Minimum | Chemicals | Norwegian Kroner | Forward Contracts | Euro |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Exchange rate | NOK / € | 9.41 | 9.41 |
Derivative maturity date | Apr. 30, 2016 |  |
Maximum | Canadian | Forward Contracts | Kronos Worldwide, Inc. | April 2016 through July 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Derivative maturity date | Jul. 31, 2016 |  |
Maximum | Canadian | Forward Contracts | Kronos Worldwide, Inc. | August 2016 through December 2016 |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Derivative maturity date | Dec. 31, 2016 |  |
Maximum | Chemicals | Norwegian Kroner | Forward Contracts |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Exchange rate | NOK / $ | 8.33 | 8.33 |
Derivative maturity date | Dec. 31, 2016 |  |
Maximum | Chemicals | Norwegian Kroner | Forward Contracts | Euro |  |  |
Financial Instrument At Fair Value [Line Items] |  |  |
Exchange rate | NOK / € | 9.47 | 9.47 |
Derivative maturity date | Dec. 31, 2016 |  |

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