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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 540,074	$ 236,916	$ 1,279,708	$ 641,576
Cost of revenue	412,772	143,844	983,912	489,586
Gross profit	127,302	93,072	295,796	151,990
Operating expenses	147,196	56,063	380,519	176,837
Interest income	178	319	472	1,859
Interest expense	(3,672)	(2,522)	(7,822)	(7,631)
Income tax benefit	311	0	5,363	0
Other income (expense), net	4,128	(640)	4,099	(1,943)
Net (loss) income	(18,949)	34,166	(82,611)	(32,562)
Real estate segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	96,346	91,909	224,812	153,233
Properties segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	20	(1,455)	6,640	(2,820)
Real estate and properties segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expenses	96,910	56,063	281,569	176,837
Rentals segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	33,011	0	67,989	0
Operating expenses	50,286	0	98,950	0
Operating Segments | Real estate segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of revenue	161,449	117,944	453,790	300,305
Operating Segments | Properties segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	238,417	19,005	503,588	170,287
Cost of revenue	238,397	20,460	496,948	173,107
Operating Segments | Rentals segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	40,406	0	82,954	0
Cost of revenue	7,395	0	14,965	0
Other revenue
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	8,206	8,503	26,084	19,999
Cost of revenue	10,281	5,885	29,729	18,422
Gross profit	(2,075)	2,618	(3,645)	1,577
Intercompany eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,750)	(445)	(11,520)	(2,248)
Cost of revenue	(4,750)	(445)	(11,520)	(2,248)
Brokerage revenue | Operating Segments | Real estate segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	243,575	194,375	637,532	425,269
Partner revenue | Operating Segments | Real estate segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 14,220	$ 15,478	$ 41,070	$ 28,269