Skechers U.S.A., Inc. Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)	3 Months Ended		9 Months Ended
Stockholders' Equity - Additional Information (Detail)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Noncontrolling Interest [Line Items]
Certain Class B stockholders converted into Class A	0	0	22,880	13,640