Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
POP displays, net	$ 10,345	$ 14,750
Prepaid marketing	2,768	6,074
Derivative assets	5,464	0
Prepaid expenses	14,482	24,204
Insurance receivable	0	37,300
Other	30,168	14,941
Total prepaid expenses and other current assets	$ 63,227	$ 97,269