Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Basic:
Net income	$ 73,348		$ 96,218		$ 111,859		$ 104,047
Less net income allocable to participating RSUs	(725)	[1]	(1,051)	[1]	(1,131)	[1]	(1,153)	[1]
Net income available for basic common shares	72,623		95,167		110,728		102,894
Weighted average common shares outstanding	346,614		341,256		345,453		340,197
Basic net income per common share	$ 0.21		$ 0.28		$ 0.32		$ 0.30
Diluted:
Net income	73,348		96,218		111,859		104,047
Less net income allocable to participating RSUs	(730)	[1]	(1,052)	[1]	(1,147)	[1]	(1,168)	[1]
Net income available for diluted common shares	$ 72,618		$ 95,166		$ 110,712		$ 102,879
Weighted average common shares outstanding	346,614		341,256		345,453		340,197
Weighted average common equivalent shares arising from:
Dilutive stock options and non-participating RSUs	3,810		4,298		4,050		4,417
Weighted average number of common and potential common shares	350,424		345,554		349,503		344,614
Diluted net income per common share	$ 0.21		$ 0.28		$ 0.32		$ 0.30

[1] During the three and six months ended June 30, 2013 and 2012, Mattel allocated a proportionate share of both dividends and undistributed earnings to participating RSUs.