Summary of Significant Accounting Policies - Marketing and Selling Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Marketing and selling expenses	$ 322,919	$ 481,468	$ 213,080

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