Document and Entity Information	3 Months Ended
	Mar. 31, 2013	May 01, 2013 CLASS A COMMON STOCK [Member]	May 01, 2013 CLASS B COMMON STOCK [Member]
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	SKX
Entity Registrant Name	SKECHERS USA INC
Entity Central Index Key	0001065837
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		39,336,387	11,257,854