Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 316,338	$ 704,971
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Percent of revenue recognized at a point in time	97.00%	98.00%
Wholesale/Other channel [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 4,558	$ 9,155
Company-Controlled channel [Member]
Disaggregation of Revenue [Line Items]
Revenue	311,780	695,816
Online and phone [Member]
Disaggregation of Revenue [Line Items]
Revenue	24,927	52,894
Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 286,853	$ 642,922