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Financial Assets and Liabilities Measured and Reported at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014
--- | --- | --- | ---
Assets: |  |  |  |
Foreign currency forward exchange contracts | [1] | $ 22,992 | $ 33,743 | $ 33,902
Cross currency swap contract | [1] | 5,288 |  |
Auction rate security | [2] |  | 30,960 | 31,142
Total assets |  | 28,280 | 64,703 | 65,044
Liabilities: |  |  |  |
Foreign currency forward exchange contracts | [1] | 8,261 | 13,398 | 12,596
Level 2 |  |  |  |
Assets: |  |  |  |
Foreign currency forward exchange contracts | [1] | 22,992 | 33,743 | 33,902
Cross currency swap contract | [1] | 5,288 |  |
Total assets |  | 28,280 | 33,743 | 33,902
Liabilities: |  |  |  |
Foreign currency forward exchange contracts | [1] | $ 8,261 | 13,398 | 12,596
Level 3 |  |  |  |
Assets: |  |  |  |
Auction rate security | [2] |  | 30,960 | 31,142
Total assets |  |  | $ 30,960 | $ 31,142
[1] | The fair values of the foreign currency forward exchange contracts and the cross currency swap contract are based on dealer quotes of market forward rates and reflect the amount that Mattel would receive or pay at their maturity dates for contracts involving the same notional amounts, currencies, and maturity dates.
[2] | The fair value of the auction rate security was estimated using a discounted cash flow model based on (i) estimated interest rates, timing, and amount of cash flows, (ii) credit spreads, recovery rates, and credit quality of the underlying securities, (iii) illiquidity considerations, and (iv) market correlation.

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Amount of securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process. + References No definition available. + Details
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- Definition Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into. + References No definition available. + Details
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