Segment Reporting and Revenue - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 225,479	$ 214,083
Cost of revenue	154,667	155,945
Gross profit	70,812	58,138
Technology and development	46,429	47,663
Marketing	24,878	40,403
General and administrative	67,873	69,439
Restructuring and reorganization	889	1,053
Total operating expenses	140,069	158,558
Loss from continuing operations	(69,257)	(100,420)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	2,483	43,110
Net loss from continuing operations	(66,774)	(57,310)
Net loss	(66,774)	(60,798)
Operating Segments | Real estate services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	131,180	127,296
Cost of revenue	110,914	111,494
Gross profit	20,266	15,802
Technology and development	28,507	28,895
Marketing	11,177	25,060
General and administrative	19,775	19,618
Restructuring and reorganization	0	0
Total operating expenses	59,459	73,573
Loss from continuing operations	(39,193)	(57,771)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	(46)	0
Net loss from continuing operations	(39,239)
Net loss		(57,771)
Operating Segments | Rentals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	49,518	42,870
Cost of revenue	11,457	9,765
Gross profit	38,061	33,105
Technology and development	15,512	15,964
Marketing	12,788	14,326
General and administrative	22,478	26,302
Restructuring and reorganization	0	0
Total operating expenses	50,778	56,592
Loss from continuing operations	(12,717)	(23,487)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	7	45
Net loss from continuing operations	(12,710)
Net loss		(23,442)
Operating Segments | Mortgage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	33,819	36,489
Cost of revenue	25,904	29,213
Gross profit	7,915	7,276
Technology and development	656	643
Marketing	906	980
General and administrative	6,683	6,929
Restructuring and reorganization	0	0
Total operating expenses	8,245	8,552
Loss from continuing operations	(330)	(1,276)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	3	(60)
Net loss from continuing operations	(327)
Net loss		(1,336)
Operating Segments | Discontinued Properties Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue		1,149
Other revenue
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	10,962	7,428
Cost of revenue	6,392	5,473
Gross profit	4,570	1,955
Technology and development	832	1,224
Marketing	7	10
General and administrative	1,154	1,053
Restructuring and reorganization	0	0
Total operating expenses	1,993	2,287
Loss from continuing operations	2,577	(332)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	244	115
Net loss from continuing operations	2,821
Net loss		(217)
Intercompany eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0
Cost of revenue	0	0
Gross profit	0	0
Technology and development	922	937
Marketing	0	27
General and administrative	17,783	15,537
Restructuring and reorganization	889	1,053
Total operating expenses	19,594	17,554
Loss from continuing operations	(19,594)	(17,554)
Interest income, interest expense, income tax expense, gain on extinguishment of convertible senior notes, and other expense, net	2,275	43,010
Net loss from continuing operations	$ (17,319)
Net loss		$ 25,456