Summary of Significant Accounting Policies - Marketing and Selling Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounting Policies [Abstract]
Marketing and selling expenses	$ 66,722	$ 131,263	$ 243,564	$ 340,409

The aggregate total amount of expenses directly related to the marketing or selling of products or services.

No definition available.

Name:	us-gaap_SellingAndMarketingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration