Restructuring Costs and Other Charges and Credits - Changes in restructuring reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Net accruals	$ 38,612	$ 0	$ 9,436
TrueReal Restructuring
Restructuring Cost and Reserve [Line Items]
Liability, beginning of period	0
Net accruals	38,612
Payments	(14,375)
Non-cash	(16,072)
Liability, end of period	8,165	0
Severance and Employee Benefits | TrueReal Restructuring
Restructuring Cost and Reserve [Line Items]
Liability, beginning of period	0
Net accruals	17,066
Payments	(9,192)
Non-cash	(1,139)
Liability, end of period	6,735	0
Other Restructuring | TrueReal Restructuring
Restructuring Cost and Reserve [Line Items]
Liability, beginning of period	0
Net accruals	21,546
Payments	(5,183)
Non-cash	(14,933)
Liability, end of period	$ 1,430	$ 0