Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($) segment
Disaggregation of Revenue [Line Items]
Number of reportable segments | segment			3	3
Net sales	$ 712,429	$ 39,830	$ 1,664,533	$ 114,614
International
Disaggregation of Revenue [Line Items]
Net sales	27,900		58,800
Kids
Disaggregation of Revenue [Line Items]
Net sales	412,637		838,613
Accessories
Disaggregation of Revenue [Line Items]
Net sales	133,727		314,450
Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	166,065	39,830	511,470	114,614
Wholesale and licensing
Disaggregation of Revenue [Line Items]
Net sales	657,455	29,396	1,466,130	83,486
Wholesale and licensing | Kids
Disaggregation of Revenue [Line Items]
Net sales	412,637		838,613
Wholesale and licensing | Accessories
Disaggregation of Revenue [Line Items]
Net sales	133,727		314,450
Wholesale and licensing | Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	111,091	29,396	313,067	83,486
Retail
Disaggregation of Revenue [Line Items]
Net sales	54,974	10,434	198,403	31,128
Retail | Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	$ 54,974	$ 10,434	$ 198,403	$ 31,128