Annual report pursuant to Section 13 and 15(d)

Summary of Quarterly Financial Information - Summary of Unaudited Financial Data (Detail)

v3.8.0.1
Summary of Quarterly Financial Information - Summary of Unaudited Financial Data (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Statement [Abstract]                      
Net sales $ 970,589 $ 1,094,829 $ 1,025,934 $ 1,072,808 $ 764,290 $ 942,417 $ 877,810 $ 978,794 $ 4,164,160 $ 3,563,311 $ 3,147,323
Gross profit 454,083 519,987 488,321 476,498 356,212 429,978 416,254 432,152 1,938,889 1,634,596 1,424,008
Net earnings (loss) (51,761) 106,830 73,400 106,635 15,169 76,542 84,009 109,639 235,104 285,359 261,047
Net earnings (loss) attributable to Skechers U.S.A., Inc. $ (66,650) $ 92,310 $ 59,535 $ 93,995 $ 6,664 $ 65,110 $ 74,107 $ 97,612 $ 179,190 $ 243,493 $ 231,912
Net earnings (loss) per share:                      
Basic $ (0.43) $ 0.59 $ 0.38 $ 0.61 $ 0.04 $ 0.42 $ 0.48 $ 0.63 $ 1.15 $ 1.58 $ 1.52
Diluted $ (0.43) $ 0.59 $ 0.38 $ 0.60 $ 0.04 $ 0.42 $ 0.48 $ 0.63 $ 1.14 $ 1.57 $ 1.50