Earnings Per Share - Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Diluted earnings per share
Net earnings (loss) attributable to Skechers U.S.A., Inc.	$ (68,097)	$ 75,180	$ (18,996)	$ 183,938
Weighted average common shares outstanding	154,138	153,413	153,849	153,446
Dilutive effect of nonvested shares		499		605
Weighted average common shares outstanding	154,138	153,912	153,849	154,051
Diluted earnings (loss) per share attributable to Skechers U.S.A., Inc.	$ (0.44)	$ 0.49	$ (0.12)	$ 1.19