Revenues - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 328,004	$ 313,221	$ 611,152	$ 581,128
Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenues	164,596		359,193
Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues	99,477		158,983
e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Revenues	63,931		92,976
Americas [Member]
Disaggregation of Revenue [Line Items]
Revenues	137,762		261,592
Americas [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenues	53,920		126,594
Americas [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues	56,594		91,310
Americas [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Revenues	27,248		43,688
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenues	128,400		225,562
Asia Pacific [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenues	71,561		143,294
Asia Pacific [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues	30,803		48,417
Asia Pacific [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Revenues	26,036		33,851
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	61,547		123,390
Europe [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenues	38,820		88,697
Europe [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues	12,080		19,256
Europe [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Revenues	10,647		15,437
Other Businesses [Member]
Disaggregation of Revenue [Line Items]
Revenues	295		608
Other Businesses [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenues	295		608
Other Businesses [Member] | Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Other Businesses [Member] | e-Commerce [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0		$ 0