Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Revenue:
Revenue		$ 656,692		$ 745,208		$ 2,550,865	$ 1,798,890
Cost of revenue (exclusive of amortization)
Cost of revenue		216,224	[1]	399,835	[1]	1,438,967	822,404
Sales and marketing		150,826		181,347		511,072	530,367
Technology and development		127,300		123,974		391,075	352,074
General and administrative		85,895		88,493		263,691	267,106
Impairment costs		0		0		76,800	0
Integration costs		0		5		0	650
Total costs and expenses		580,245		793,654		2,681,605	1,972,601
Income (loss) from operations		76,447		(48,446)		(130,740)	(173,711)
Gain on partial extinguishment of 2021 Notes		0		0		6,391	0
Other income		3,018		8,999		22,726	27,625
Interest expense		(39,470)		(26,502)		(114,652)	(61,865)
Income (loss) before income taxes		39,995		(65,949)		(216,275)	(207,951)
Income tax benefit (expense)		(425)		1,300		8,124	3,800
Net income (loss)		$ 39,570		$ (64,649)		$ (208,151)	$ (204,151)
Basic (usd per share)		$ 0.17		$ (0.31)		$ (0.95)	$ (0.99)
Diluted (usd per share)		$ 0.16		$ (0.31)		$ (0.95)	$ (0.99)
Basic (in shares)		229,719		207,002		219,989	205,766
Diluted (in shares)		242,632		207,002		219,989	205,766
Amortization of website development costs and intangible assets included in technology and development		$ 12,800		$ 11,100		$ 37,700	$ 33,100
Technology and Development
Cost of revenue (exclusive of amortization)
Amortization of website development costs and intangible assets included in technology and development	[1]	19,245		15,835		55,286	44,891
Homes
Revenue:
Revenue		187,105		384,626		1,411,230	762,022
Cost of revenue (exclusive of amortization)
Cost of revenue		179,804	[1]	370,796	[1]	1,343,791	733,947
Sales and marketing		32,714		49,186		152,180	107,457
Technology and development		28,273		20,651		89,729	51,130
General and administrative		20,334		22,174		65,657	54,339
Impairment costs						0	0
Integration costs		0		0		0	0
Total costs and expenses		261,125		462,807		1,651,357	946,873
Income (loss) from operations		(74,020)		(78,181)		(240,127)	(184,851)
Other income		0		0		0	0
Interest expense		(1,597)		(9,689)		(13,506)	(19,346)
Income (loss) before income taxes		(75,617)		(87,870)		(253,633)	(204,197)
IMT
Revenue:
Revenue		415,389		335,290		1,026,394	957,231
Cost of revenue (exclusive of amortization)
Cost of revenue		28,448	[1]	24,318	[1]	76,153	74,628
Sales and marketing		102,902		118,514		319,101	380,608
Technology and development		90,536		94,656		278,740	276,886
General and administrative		53,547		55,749		166,185	181,270
Impairment costs						73,900	0
Integration costs		0		0		0	0
Total costs and expenses		275,433		293,237		914,079	913,392
Income (loss) from operations		139,956		42,053		112,315	43,839
Other income		0		0		5,300	0
Interest expense		0		0		0	0
Income (loss) before income taxes		139,956		42,053		117,615	43,839
Mortgages Segment
Revenue:
Revenue		54,198		25,292		113,241	79,637
Cost of revenue (exclusive of amortization)
Cost of revenue		7,972	[1]	4,721	[1]	19,023	13,829
Sales and marketing		15,210		13,647		39,791	42,302
Technology and development		8,491		8,667		22,606	24,058
General and administrative		12,014		10,570		31,849	31,497
Impairment costs						2,900	0
Integration costs		0		5		0	650
Total costs and expenses		43,687		37,610		116,169	112,336
Income (loss) from operations		10,511		(12,318)		(2,928)	(32,699)
Other income		636		344		1,223	1,059
Interest expense		(553)		(280)		(1,086)	(668)
Income (loss) before income taxes		$ 10,594		$ (12,254)		$ (2,791)	$ (32,308)

[1] Amortization of website development costs and intangible assets included in technology and development of $19,245 and $15,835 for the three months ended September 30, 2020 and 2019, respectively and $55,286 and $44,891 for the nine months ended September 30, 2020 and 2019, respectively.