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Financial Instruments - Additional Information (Detail) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2013 Amalgamated Sugar Company LLC USD ($) | Dec. 31, 2013 Forward Contracts USD ($) | Dec. 31, 2012 Forward Contracts USD ($) | Dec. 31, 2013 Forward Contracts Wells Fargo Bank Na Canadian Dollar USD ($) | Dec. 31, 2013 Forward Contracts DnB Nor Bank ASA USD ($) | Dec. 31, 2013 Forward Contracts DnB Nor Bank ASA EUR (€) | Dec. 31, 2013 Forward Contracts Minimum Wells Fargo Bank Na Canadian Dollar | Dec. 31, 2013 Forward Contracts Minimum DnB Nor Bank ASA U S Dollar | Dec. 31, 2013 Forward Contracts Minimum DnB Nor Bank ASA Euros | Dec. 31, 2013 Forward Contracts Maximum Wells Fargo Bank Na Canadian Dollar | Dec. 31, 2013 Forward Contracts Maximum DnB Nor Bank ASA U S Dollar | Dec. 31, 2013 Forward Contracts Maximum DnB Nor Bank ASA Euros | Dec. 31, 2012 Kronos Worldwide, Inc. Term Loan Per Thousand Dollar Principal Amount USD ($)
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Financial Instrument At Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated fair value of currency forward contracts | $ (1,000,000) | $ 1,800,000 |  | $ (1,000,000) | $ 1,800,000 |  |  |  |  |  |  |  |  |  |
Estimated fair value of currency forward contracts included accounts and other receivables |  |  |  | 200,000 | 1,800,000 |  |  |  |  |  |  |  |  |  |
Estimated fair value of currency forward contracts included accounts payable and accrued liabilities |  |  |  | 1,200,000 |  |  |  |  |  |  |  |  |  |  |
Estimated market price of the notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,017.5
Principal amount of debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000
Marketable securities | 253,300,000 | 256,800,000 | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount currency forward contract |  |  |  |  |  | 36,000,000 | 20,000,000 | 20,000,000 |  |  |  |  |  |  |
Exchange floor rate |  |  |  |  |  |  |  |  | 1.02 | 6.12 | 8.04 | 1.06 | 6.25 | 8.41 |
Maturity rate of derivative |  |  |  |  |  | $ 3,000,000 | $ 5,000,000 | € 5,000,000 |  |  |  |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 + Details
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- Definition Fair value portion of notes payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of currency forward contracts recognized in accounts and other receivables. + References No definition available. + Details
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