Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue	$ 8,147,376	$ 3,339,817	$ 2,742,837
Cost of revenue (exclusive of amortization)
Cost of revenue	6,394,177	1,866,392	1,544,099
Gross profit	1,753,199	1,473,425	1,198,738
Operating expenses:
Sales and marketing	1,076,235	691,119	728,631
Technology and development	474,396	390,172	350,923
General and administrative	448,773	356,722	366,019
Impairment and restructuring costs	72,173	76,800	0
Acquisition-related costs	8,615	0	0
Integration costs	680	0	650
Total operating expenses	2,080,872	1,514,813	1,446,223
Loss from operations	(327,673)	(41,388)	(247,485)
Gain (loss) on extinguishment of debt	(17,119)	1,448	0
Other income	10,188	25,529	39,658
Interest expense	(191,910)	(155,227)	(101,792)
Loss before income taxes	(526,514)	(169,638)	(309,619)
Income tax benefit (expense)	(1,263)	7,523	4,258
Net loss	$ (527,777)	$ (162,115)	$ (305,361)
Net loss per share - basic (usd per share)	$ (2.11)	$ (0.72)	$ (1.48)
Net loss per share - diluted (usd per share)	$ (2.11)	$ (0.72)	$ (1.48)
Weighted-average shares outstanding - basic (in shares)	249,937	223,848	206,380
Weighted-average shares outstanding - diluted (in shares)	249,937	223,848	206,380
Homes
Revenue:
Revenue	$ 6,015,778	$ 1,715,375	$ 1,365,250
Cost of revenue (exclusive of amortization)
Cost of revenue	6,106,944	1,634,755	1,324,464
IMT
Revenue:
Revenue	1,885,782	1,450,232	1,276,896
Cost of revenue (exclusive of amortization)
Cost of revenue	203,449	193,097	193,885
Mortgages
Revenue:
Revenue	245,816	174,210	100,691
Cost of revenue (exclusive of amortization)
Cost of revenue	$ 83,784	$ 38,540	$ 25,750