Earnings Per Share - Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Diluted earnings per share
Net earnings attributable to Skechers U.S.A., Inc.	$ 26,849	$ 11,004	$ 40,623	$ 5,556
Weighted average common shares outstanding	50,393	49,443	50,329	49,335
Dilutive effect of stock options	211	480	203	499
Weighted average common shares outstanding	50,604	49,923	50,532	49,834
Diluted earnings per share attributable to Skechers U.S.A., Inc.	$ 0.53	$ 0.22	$ 0.80	$ 0.11