Disaggregation of Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)
Disaggregation of Revenue [Line Items]
Number of reportable segments | segment	3
Net sales	$ 596,602	$ 164,053
International
Disaggregation of Revenue [Line Items]
Net sales	29,800	15,700
Kids
Disaggregation of Revenue [Line Items]
Net sales	216,298
Accessories
Disaggregation of Revenue [Line Items]
Net sales	97,299
Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	283,005	164,053
Wholesale and licensing
Disaggregation of Revenue [Line Items]
Net sales	488,638	121,958
Wholesale and licensing | Kids
Disaggregation of Revenue [Line Items]
Net sales	216,298
Wholesale and licensing | Accessories
Disaggregation of Revenue [Line Items]
Net sales	97,299
Wholesale and licensing | Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	175,041	121,958
Retail
Disaggregation of Revenue [Line Items]
Net sales	107,964	42,095
Retail | Men's & Women's Apparel
Disaggregation of Revenue [Line Items]
Net sales	$ 107,964	$ 42,095