Investments - Equity Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Equity investments	$ 5,391,000	$ 0
Equity investments without readily determinable fair values	85,000	539,000	$ 307,000
Total equity investments	7,984,000	547,000
Adevinta
Schedule of Investments [Line Items]
Equity investments	5,391,000	0
Short-term Investments
Schedule of Investments [Line Items]
Equity investments with readily determinable fair values	1,745,000	0
Long-term Investments
Schedule of Investments [Line Items]
Equity investments	725,000
Equity investments without readily determinable fair values	85,000	539,000
Equity investments under the equity method of accounting	$ 38,000	$ 8,000