Segment Reporting and Revenue - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 600,517	$ 540,074	$ 1,804,778	$ 1,279,708
Cost of revenue	542,440	412,772	1,556,161	983,912
Gross profit	58,077	127,302	248,617	295,796
Technology and development	48,063	43,658	149,209	112,824
Marketing	33,748	49,143	133,832	116,343
General and administrative	61,005	54,395	191,704	151,352
Restructuring and reorganization	284	0	18,670	0
Total operating expenses	143,100	147,196	493,415	380,519
Income (loss) from operations	(85,023)	(19,894)	(244,798)	(84,723)
Interest income, interest expense, income tax expense, and other expense, net	(5,222)	945	(14,399)	2,112
Net loss	(90,245)	(18,949)	(259,197)	(82,611)
Operating Segments | Real estate services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	211,540	257,795	640,835	678,602
Cost of revenue	156,632	161,449	488,114	453,790
Gross profit	54,908	96,346	152,721	224,812
Technology and development	25,709	20,732	80,144	60,862
Marketing	18,772	33,894	90,380	86,823
General and administrative	20,244	18,383	67,578	60,813
Restructuring and reorganization	0		0
Total operating expenses	64,725	73,009	238,102	208,498
Income (loss) from operations	(9,817)	23,337	(85,381)	16,314
Interest income, interest expense, income tax expense, and other expense, net	0	(56)	(123)	(87)
Net loss	(9,817)	23,281	(85,504)	16,227
Operating Segments | Properties
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	299,663	238,417	942,022	503,588
Cost of revenue	332,251	238,397	946,955	496,948
Gross profit	(32,588)	20	(4,933)	6,640
Technology and development	4,728	3,602	13,531	9,512
Marketing	506	645	2,480	1,423
General and administrative	3,029	2,258	9,064	6,765
Restructuring and reorganization	0		0
Total operating expenses	8,263	6,505	25,075	17,700
Income (loss) from operations	(40,851)	(6,485)	(30,008)	(11,060)
Interest income, interest expense, income tax expense, and other expense, net	(2,814)	(1,456)	(5,682)	(2,538)
Net loss	(43,665)	(7,941)	(35,690)	(13,598)
Operating Segments | Rentals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	38,686	40,406	114,979	82,954
Cost of revenue	8,676	7,395	23,769	14,965
Gross profit	30,010	33,011	91,210	67,989
Technology and development	15,385	13,849	44,539	27,616
Marketing	12,678	14,113	36,806	26,724
General and administrative	22,722	23,264	68,738	46,413
Restructuring and reorganization	0		0
Total operating expenses	50,785	51,226	150,083	100,753
Income (loss) from operations	(20,775)	(18,215)	(58,873)	(32,764)
Interest income, interest expense, income tax expense, and other expense, net	397	311	1,098	523
Net loss	(20,378)	(17,904)	(57,775)	(32,241)
Operating Segments | Mortgage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	48,469	5,013	104,484	15,823
Cost of revenue	43,783	6,705	95,616	19,406
Gross profit	4,686	(1,692)	8,868	(3,583)
Technology and development	985	2,910	5,236	7,814
Marketing	1,653	149	3,525	413
General and administrative	7,073	2,334	18,047	5,686
Restructuring and reorganization	0		0
Total operating expenses	9,711	5,393	26,808	13,913
Income (loss) from operations	(5,025)	(7,085)	(17,940)	(17,496)
Interest income, interest expense, income tax expense, and other expense, net	(129)	1	(164)	2
Net loss	(5,154)	(7,084)	(18,104)	(17,494)
Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	7,079	3,193	17,341	10,261
Cost of revenue	6,018	3,576	16,590	10,323
Gross profit	1,061	(383)	751	(62)
Technology and development	751	586	2,975	1,538
Marketing	48	42	173	105
General and administrative	784	533	2,346	1,466
Restructuring and reorganization	0		0
Total operating expenses	1,583	1,161	5,494	3,109
Income (loss) from operations	(522)	(1,544)	(4,743)	(3,171)
Interest income, interest expense, income tax expense, and other expense, net	40	1	51	2
Net loss	(482)	(1,543)	(4,692)	(3,169)
Corporate Overhead and Intercompany Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,920)	(4,750)	(14,883)	(11,520)
Cost of revenue	(4,920)	(4,750)	(14,883)	(11,520)
Gross profit	0	0	0	0
Technology and development	505	1,979	2,784	5,482
Marketing	91	300	468	855
General and administrative	7,153	7,623	25,931	30,209
Restructuring and reorganization	284		18,670
Total operating expenses	8,033	9,902	47,853	36,546
Income (loss) from operations	(8,033)	(9,902)	(47,853)	(36,546)
Interest income, interest expense, income tax expense, and other expense, net	(2,716)	2,144	(9,579)	4,210
Net loss	$ (10,749)	$ (7,758)	$ (57,432)	$ (32,336)