Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

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When the derivative or group of derivatives presented is a swap, the type of interest rate (fixed, variable, stepped, etc.) paid on the swap.

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-Publisher SEC

-Name Regulation S-X (SX)

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

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Fixed interest rate related to the interest rate derivative.

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Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

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Contractual rate at which a foreign currency can be purchased or sold.

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Date the entity entered into the derivative contract, in CCYY-MM-DD format.

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Description of the type of derivative instrument, such as a swap, forward, and option. Excludes the underlying risk of the instrument.

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-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

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Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments.

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The market price or dollar value of a bond traded in open markets, reflecting any premium or discount to par value.

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The nominal value (par value) or dollar value of a bond paid to the holder at maturity.

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Notional amount of currency the company is contractually obligated to exchange per month.

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Date the derivative contract notional amount begins to decline, in CCYY-MM-DD format.

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Notional amount of decline in the swap notional amount each quarter.

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Financial instrument at fair value.

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Foreign currency contract asset liability net fair value disclosure.

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Fair Value Measurements and Financial Instruments - Additional Information (Detail)		6 Months Ended
	Aug. 07, 2015 USD ($)	Jun. 30, 2015 USD ($) NOK / $ NOK / €	Jul. 31, 2015 CAD CAD / $	Jun. 30, 2015 EUR (€) NOK / $ NOK / €	Dec. 31, 2014 USD ($)
Financial Instrument At Fair Value [Line Items]
Estimated fair value of currency forward contracts		$ (2,000,000)			$ (4,200,000)
Marketable securities		256,200,000			255,600,000
Kronos Worldwide, Inc. \| 2014 Term Loan
Financial Instrument At Fair Value [Line Items]
Estimated market price of the notes		1,000			983.1
Principal amount of debt instrument		1,000			1,000
Amalgamated Sugar Company LLC
Financial Instrument At Fair Value [Line Items]
Marketable securities		250,000,000			$ 250,000,000
Subsequent Event \| Kronos Worldwide, Inc. \| Interest Rate Swap \| LIBOR
Financial Instrument At Fair Value [Line Items]
Notional amount currency forward contract	$ 344,750,000
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%
Interest rate swap, floor rate	1.00%
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, final maturity date	Feb. 29, 2020
Chemicals \| Forward Contracts
Financial Instrument At Fair Value [Line Items]
Estimated fair value of currency forward contracts		(2,000,000)
Currency transaction loss		(2,000,000)
Chemicals \| Norwegian Kroner \| Forward Contracts
Financial Instrument At Fair Value [Line Items]
Notional amount currency forward contract		16,200,000
Maturity rate of derivative		$ 2,700,000
Chemicals \| Norwegian Kroner \| Forward Contracts \| Euro
Financial Instrument At Fair Value [Line Items]
Notional amount currency forward contract \| €				€ 10,000,000
Maturity rate of derivative \| €				€ 5,000,000
Chemicals \| Canadian \| Subsequent Event
Financial Instrument At Fair Value [Line Items]
Notional amount currency forward contract \| CAD			CAD 30,700,000
Exchange rate \| CAD / $			1.29
Maturity rate of derivative \| CAD			CAD 2,600,000
Minimum \| Chemicals \| Norwegian Kroner \| Forward Contracts
Financial Instrument At Fair Value [Line Items]
Exchange rate \| NOK / $		7.09		7.09
Minimum \| Chemicals \| Norwegian Kroner \| Forward Contracts \| Euro
Financial Instrument At Fair Value [Line Items]
Exchange rate \| NOK / €		8.53		8.53
Maximum \| Chemicals \| Norwegian Kroner \| Forward Contracts
Financial Instrument At Fair Value [Line Items]
Exchange rate \| NOK / $		7.11		7.11
Maximum \| Chemicals \| Norwegian Kroner \| Forward Contracts \| Euro
Financial Instrument At Fair Value [Line Items]
Exchange rate \| NOK / €		8.56		8.56