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SEGMENT INFORMATION - Revenue Disaggregated by Service (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,246,874 | $ 1,104,592 | $ 3,539,375 | $ 3,158,789
Operating segments | Match Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 541,493 | 443,943 | 1,504,091 | 1,272,506
Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 357,358 | 303,116 | 1,004,697 | 853,249
Operating segments | Vimeo |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 52,145 | 40,304 | 141,439 | 115,432
Operating segments | Dotdash |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 40,285 | 30,053 | 111,974 | 90,841
Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 126,071 | 153,973 | 402,557 | 429,034
Operating segments | Applications | Mosaic Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 51,203 | 35,431 | 146,864 | 78,474
Operating segments | Emerging & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 129,581 | 133,345 | 374,871 | 398,026
North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 339,144 | 286,594 | 945,538 | 800,125
International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 439,686 | 365,993 | 1,245,711 | 1,054,039
Europe | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 18,214 | 16,522 | 59,159 | 53,124
Direct revenue | Operating segments | Match Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 530,949 | 431,545 | 1,472,211 | 1,232,009
Direct revenue | North America | Operating segments | Match Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 268,863 | 233,643 | 758,135 | 667,163
Direct revenue | International | Operating segments | Match Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 262,086 | 197,902 | 714,076 | 564,846
Indirect revenue (principally advertising revenue) | Operating segments | Match Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 10,544 | 12,398 | 31,880 | 40,497
Total Marketplace revenue | North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 270,516 | 213,049 | 749,969 | 583,392
Consumer connection revenue | North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 252,552 | 195,065 | 695,370 | 531,297
Membership subscription revenue | North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 16,237 | 17,034 | 49,239 | 49,226
Other revenue | North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,727 | 950 | 5,360 | 2,869
Advertising and other revenue | North America | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 68,628 | 73,545 | 195,569 | 216,733
Advertising and other revenue | Europe | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 624 | 283 | 1,859 | 834
Consumer connection revenue | Europe | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 14,125 | 12,022 | 46,480 | 38,885
Membership subscription revenue | Europe | Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 3,465 | 4,217 | 10,820 | 13,405
Platform revenue | Operating segments | Vimeo |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 52,145 | 37,245 | 139,160 | 106,470
Hardware revenue | Operating segments | Vimeo |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0 | 3,059 | 2,279 | 8,962
Advertising revenue | Operating segments | Dotdash |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 29,158 | 23,949 | 84,171 | 71,714
Advertising revenue | Operating segments | Applications | Mosaic Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 2,124 | 4,274 | 6,957 | 14,787
Advertising revenue | Operating segments | Emerging & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 113,564 | 105,873 | 330,438 | 317,047
Google advertising revenue | Operating segments | Emerging & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 101,609 | 84,955 | 303,207 | 266,061
Other advertising revenue | Operating segments | Emerging & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 11,955 | 20,918 | 27,231 | 50,986
Affiliate commerce commission and other revenue | Operating segments | Dotdash |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 11,127 | 6,104 | 27,803 | 19,127
Total Desktop revenue | Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 74,868 | 118,542 | 255,693 | 350,560
Total advertising revenue | Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 71,255 | 114,271 | 243,584 | 334,205
Google advertising revenue | Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 68,076 | 110,855 | 234,211 | 326,982
Other advertising revenue | Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 3,179 | 3,416 | 9,373 | 7,223
Subscription and other revenue | Operating segments | Applications |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 3,613 | 4,271 | 12,109 | 16,355
Subscription and other revenue | Operating segments | Applications | Mosaic Group |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 49,079 | 31,157 | 139,907 | 63,687
Other revenue | Operating segments | Emerging & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 16,017 | $ 27,472 | $ 44,433 | $ 80,979

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