Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue:
Revenue		$ 3,339,817	$ 2,742,837	$ 1,333,554
Cost of revenue (exclusive of amortization)
Cost of revenue		1,756,395	1,432,021	153,590
Sales and marketing		672,816	714,128	552,621
Technology and development		518,072	477,347	410,818
General and administrative		357,122	366,176	262,153
Impairment costs		76,800	0	79,000
Acquisition-related costs		0	0	2,332
Integration costs		0	650	2,015
Total costs and expenses		3,381,205	2,990,322	1,462,529
Loss from operations		(41,388)	(247,485)	(128,975)
Gain on extinguishment of 2021 Notes		1,448	0	0
Other income		25,529	39,658	19,270
Interest expense		(155,227)	(101,792)	(41,255)
Loss before income taxes		(169,638)	(309,619)	(150,960)
Income tax benefit		7,523	4,258	31,102
Net loss		$ (162,115)	$ (305,361)	$ (119,858)
Net loss per share - basic and diluted (usd per share)		$ (0.72)	$ (1.48)	$ (0.61)
Weighted-average shares outstanding - basic and diluted (in shares)		223,848	206,380	197,944
Homes
Revenue:
Revenue		$ 1,715,375	$ 1,365,250	$ 52,365
Cost of revenue (exclusive of amortization)
Cost of revenue	[1]	1,621,040	1,315,345	49,392
Sales and marketing		190,829	171,634	17,134
Technology and development		119,885	78,994	21,351
General and administrative		87,071	81,407	22,002
Impairment costs		0	0	0
Acquisition-related costs		0	0	0
Integration costs		0	0	0
Total costs and expenses		2,018,825	1,647,380	109,879
Loss from operations		(303,450)	(282,130)	(57,514)
Other income		0	0	0
Interest expense		(16,804)	(29,990)	(2,177)
Loss before income taxes		(320,254)	(312,120)	(59,691)
IMT
Revenue:
Revenue		1,450,232	1,276,896	1,201,143
Cost of revenue (exclusive of amortization)
Cost of revenue	[1]	104,091	98,522	96,693
Sales and marketing		422,385	488,909	502,785
Technology and development		367,070	365,769	363,712
General and administrative		225,102	243,636	220,564
Impairment costs		73,900	0	75,000
Acquisition-related costs		0	0	27
Integration costs		0	0	0
Total costs and expenses		1,192,548	1,196,836	1,258,781
Loss from operations		257,684	80,060	(57,638)
Other income		5,300	0	0
Interest expense		0	0	0
Loss before income taxes		262,984	80,060	(57,638)
Mortgages
Revenue:
Revenue		174,210	100,691	80,046
Cost of revenue (exclusive of amortization)
Cost of revenue	[1]	31,264	18,154	7,505
Sales and marketing		59,602	53,585	32,702
Technology and development		31,117	32,584	25,755
General and administrative		44,949	41,133	19,587
Impairment costs		2,900	0	4,000
Acquisition-related costs		0	0	2,305
Integration costs		0	650	2,015
Total costs and expenses		169,832	146,106	93,869
Loss from operations		4,378	(45,415)	(13,823)
Other income		2,369	1,409	244
Interest expense		(2,233)	(956)	(132)
Loss before income taxes		$ 4,514	$ (44,962)	$ (13,711)

[1]  ____________________
(1) Amortization of website development costs and intangible assets included in technology and development