Income Tax - Loss (Income) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	$ 334,620	$ 443,286	$ 704,471
Cayman Islands
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	(16,792)	19,454	28,401
British Virgin Islands
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	0	2	2
Mainland China
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	253,274	290,056	340,865
Hong Kong
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	4,483	53,425	243,400
United States
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	92,869	79,620	89,374
Australia
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	14	(260)	1,758
Taiwan
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	$ 772	$ 989	$ 671