Segment Reporting and Revenue - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 1,042,979	$ 976,672	$ 1,099,574
Cost of revenue	678,778	646,853	790,455
Gross profit	364,201	329,819	309,119
Technology and development	163,927	183,294	178,924
Marketing	114,481	117,863	155,309
General and administrative	235,364	238,790	243,390
Employee termination costs	5,684	7,927	32,353
Total operating expenses	519,456	547,874	609,976
(Loss) income from continuing operations	(155,255)	(218,055)	(300,857)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	(9,546)	91,663	51,060
Net income (loss) from continuing operations	(164,801)	(126,392)	(249,797)
Title
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue		25,095	17,425
Cost of revenue		23,335	21,694
Gross profit		1,760	(4,269)
Technology and development		510	1,728
Marketing		54	194
General and administrative		2,776	2,751
Employee termination costs		0	0
Total operating expenses		3,340	4,673
(Loss) income from continuing operations		(1,580)	(8,942)
Net income (loss) from continuing operations		(1,232)	(8,895)
Monetization
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue		14,080	6,259
Cost of revenue		629	766
Gross profit		13,451	5,493
Technology and development		3,994	1,863
Marketing		6	5
General and administrative		1,241	556
Employee termination costs		0	0
Total operating expenses		5,241	2,424
(Loss) income from continuing operations		8,210	3,069
Net income (loss) from continuing operations		8,574	3,162
Operating Segments | Real estate services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	642,867	618,577	787,076
Cost of revenue	487,513	462,625	608,027
Gross profit	155,354	155,952	179,049
Technology and development	105,268	108,201	105,196
Marketing	57,961	59,746	98,673
General and administrative	74,794	76,851	88,171
Employee termination costs	0	0	0
Total operating expenses	238,023	244,798	292,040
(Loss) income from continuing operations	(82,669)	(88,846)	(112,991)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	(25)	59	(123)
Net income (loss) from continuing operations	(82,694)	(88,787)	(113,114)
Operating Segments | Rentals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	203,739	184,812	155,910
Cost of revenue	47,724	42,086	33,416
Gross profit	156,015	142,726	122,494
Technology and development	48,015	63,934	59,899
Marketing	53,490	53,952	51,064
General and administrative	88,447	94,252	92,728
Employee termination costs	0	503	0
Total operating expenses	189,952	212,641	203,691
(Loss) income from continuing operations	(33,937)	(69,915)	(81,197)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	197	215	1,389
Net income (loss) from continuing operations	(33,740)	(69,700)	(79,808)
Operating Segments | Mortgage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	139,829	134,108	132,904
Cost of revenue	115,556	118,178	126,552
Gross profit	24,273	15,930	6,352
Technology and development	2,727	2,871	6,034
Marketing	2,988	4,064	4,889
General and administrative	25,428	25,012	25,680
Employee termination costs	0	0	0
Total operating expenses	31,143	31,947	36,603
(Loss) income from continuing operations	(6,870)	(16,017)	(30,251)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	(2,968)	(392)	(114)
Net income (loss) from continuing operations	(9,838)	(16,409)	(30,365)
Operating Segments | Discontinued Properties Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue		1,244	17,783
Title | Title
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	37,509	25,095	17,425
Cost of revenue	27,024	23,335	21,694
Gross profit	10,485	1,760	(4,269)
Technology and development	448	510	1,728
Marketing	37	54	194
General and administrative	3,215	2,776	2,751
Employee termination costs	0	0	0
Total operating expenses	3,700	3,340	4,673
(Loss) income from continuing operations	6,785	(1,580)	(8,942)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	690	348	47
Net income (loss) from continuing operations	7,475	(1,232)	(8,895)
Title | Monetization
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	19,035	14,080	6,259
Cost of revenue	961	629	766
Gross profit	18,074	13,451	5,493
Technology and development	3,107	3,994	1,863
Marketing	4	6	5
General and administrative	1,520	1,241	556
Employee termination costs	0	0	0
Total operating expenses	4,631	5,241	2,424
(Loss) income from continuing operations	13,443	8,210	3,069
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	283	364	93
Net income (loss) from continuing operations	13,726	8,574	3,162
Corporate overhead
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	0	0	0
Cost of revenue	0	0	0
Gross profit	0	0	0
Technology and development	4,362	3,784	4,204
Marketing	1	41	484
General and administrative	41,960	38,658	33,504
Employee termination costs	5,684	7,424	32,353
Total operating expenses	52,007	49,907	70,545
(Loss) income from continuing operations	(52,007)	(49,907)	(70,545)
Interest income, interest expense, income tax benefit, gain on extinguishment of convertible senior notes, and other expense, net	(7,723)	91,069	49,768
Net income (loss) from continuing operations	$ (59,730)	$ 41,162	$ (20,777)