Segment Reporting and Revenue - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 2,284,442	$ 1,922,765	$ 886,093
Cost of revenue	1,998,389	1,518,945	653,983
Gross profit	286,053	403,820	232,110
Technology and development	196,250	156,718	84,297
Marketing	158,071	138,740	54,881
General and administrative	254,593	218,315	85,624
Restructuring and reorganization	40,469	0	6,516
Total operating expenses	649,383	513,773	231,318
Loss from operations	(363,330)	(109,953)	792
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	42,187	340	(19,319)
Net loss	(321,143)	(109,613)	(18,527)
Operating Segments | Real estate services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	787,076	903,334	651,208
Cost of revenue	608,027	603,320	417,140
Gross profit	179,049	300,014	234,068
Technology and development	105,196	81,588	66,389
Marketing	98,673	98,746	53,399
General and administrative	88,171	84,655	54,538
Restructuring and reorganization	0	0	0
Total operating expenses	292,040	264,989	174,326
Loss from operations	(112,991)	35,025	59,742
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	(123)	(87)	0
Net loss	(113,114)	34,938	59,742
Operating Segments | Properties
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,202,651	880,653	209,686
Cost of revenue	1,225,717	870,052	214,382
Gross profit	(23,066)	10,601	(4,696)
Technology and development	17,326	13,237	5,986
Marketing	2,762	1,889	536
General and administrative	11,203	9,593	2,810
Restructuring and reorganization	0	0	0
Total operating expenses	31,291	24,719	9,332
Loss from operations	(54,357)	(14,118)	(14,028)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	(7,607)	(4,261)	(1,018)
Net loss	(61,964)	(18,379)	(15,046)
Operating Segments | Rentals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	155,910	121,877	0
Cost of revenue	33,416	21,739	0
Gross profit	122,494	100,138	0
Technology and development	59,899	41,492	0
Marketing	51,064	36,174	0
General and administrative	92,728	71,943	0
Restructuring and reorganization	0	0	0
Total operating expenses	203,691	149,609	0
Loss from operations	(81,197)	(49,471)	0
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	1,389	3,301	0
Net loss	(79,808)	(46,170)	0
Operating Segments | Mortgage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	132,904	19,818	15,835
Cost of revenue	126,552	26,096	15,627
Gross profit	6,352	(6,278)	208
Technology and development	6,034	10,396	5,914
Marketing	4,889	561	267
General and administrative	25,680	8,306	1,665
Restructuring and reorganization	0	0	0
Total operating expenses	36,603	19,263	7,846
Loss from operations	(30,251)	(25,541)	(7,638)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	(114)	3	73
Net loss	(30,365)	(25,538)	(7,565)
Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	23,684	13,609	12,377
Cost of revenue	22,460	14,264	9,847
Gross profit	1,224	(655)	2,530
Technology and development	3,591	2,528	1,288
Marketing	199	209	88
General and administrative	3,307	2,288	764
Restructuring and reorganization	0	0	0
Total operating expenses	7,097	5,025	2,140
Loss from operations	(5,873)	(5,680)	390
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	140	2	30
Net loss	(5,733)	(5,678)	420
Corporate Overhead and Intercompany Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(17,783)	(16,526)	(3,013)
Cost of revenue	(17,783)	(16,526)	(3,013)
Gross profit	0	0	0
Technology and development	4,204	7,477	4,720
Marketing	484	1,161	591
General and administrative	33,504	41,530	25,847
Restructuring and reorganization	40,469	0	6,516
Total operating expenses	78,661	50,168	37,674
Loss from operations	(78,661)	(50,168)	(37,674)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	48,502	1,382	(18,404)
Net loss	$ (30,159)	$ (48,786)	$ (56,078)