Revenues - Disaggregated Revenues (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Total revenues	$ 283,148
Wholesale [Member]
Disaggregation of Revenue [Line Items]
Total revenues	194,597
Retail [Member]
Disaggregation of Revenue [Line Items]
Total revenues	59,506
e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Total revenues	29,045
Americas [Member]
Disaggregation of Revenue [Line Items]
Total revenues	123,830
Americas [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Total revenues	72,674
Americas [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Total revenues	34,716
Americas [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Total revenues	16,440
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Total revenues	97,162
Asia Pacific [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Total revenues	71,733
Asia Pacific [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Total revenues	17,614
Asia Pacific [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Total revenues	7,815
Europe [Member]
Disaggregation of Revenue [Line Items]
Total revenues	61,843
Europe [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Total revenues	49,877
Europe [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Total revenues	7,176
Europe [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Total revenues	4,790
Other Businesses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	313
Other Businesses [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Total revenues	313
Other Businesses [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Total revenues	0
Other Businesses [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 0