Financial Assets and Liabilities Measured and Reported at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012		Jun. 30, 2012
Assets:
Foreign currency forward exchange contracts	$ 7,389	[1]	$ 3,068	[1]	$ 45,183	[1]
Auction rate securities	23,222	[2]	19,256	[2]	14,460	[2]
Total assets	30,611		22,324		59,643
Liabilities:
Foreign currency forward exchange contracts	5,078	[1]	8,757	[1]	2,999	[1]
Level 2
Assets:
Foreign currency forward exchange contracts	7,389	[1]	3,068	[1]	45,183	[1]
Total assets	7,389		3,068		45,183
Liabilities:
Foreign currency forward exchange contracts	5,078	[1]	8,757	[1]	2,999	[1]
Level 3
Assets:
Auction rate securities	23,222	[2]	19,256	[2]	14,460	[2]
Total assets	$ 23,222		$ 19,256		$ 14,460

[1] The fair value of the foreign currency forward exchange contracts is based on dealer quotes of market forward rates and reflects 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 securities is 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.