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GOODWILL AND INTANGIBLE ASSETS - Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Goodwill |  |  |
Balance at beginning of period | $ 2,854,462 | $ 2,726,859 | $ 2,726,859
Additions | 416,797 |  | 168,866
(Deductions) | (38) |  | (29,267)
Impairment | (211,973) | 0 | (3,318)
Foreign Exchange Translation | (17,109) |  | (8,678)
Balance at end of period | 3,042,139 |  | 2,854,462
Match Group |  |  |
Goodwill |  |  |
Balance at beginning of period | 1,239,840 | 1,245,013 | 1,245,013
Additions |  |  | 3,553
(Deductions) | 0 |  | 0
Foreign Exchange Translation | (12,108) |  | (8,726)
Balance at end of period | 1,227,732 |  | 1,239,840
ANGI Homeservices |  |  |
Goodwill |  |  |
Balance at beginning of period | 882,051 | 892,800 | 892,800
Additions | 0 |  | 18,326
(Deductions) | 0 |  | (29,267)
Impairment | 0 |  | 0
Foreign Exchange Translation | (4,867) |  | 192
Balance at end of period | 877,184 |  | 882,051
Vimeo |  |  |
Goodwill |  |  |
Balance at beginning of period | 219,374 | 77,152 | 77,152
Additions | 0 |  | 142,222
(Deductions) | (38) |  | 0
Impairment | 0 |  | 0
Foreign Exchange Translation | 0 |  | 0
Balance at end of period | 219,336 |  | 219,374
Applications |  |  |
Goodwill |  |  |
Balance at beginning of period | 504,748 | 504,892 | 504,892
Additions | 0 |  | 0
(Deductions) | 0 |  | 0
Impairment | (211,973) |  | 0
Foreign Exchange Translation | (134) |  | (144)
Balance at end of period | 292,641 |  | 504,748
Applications | Desktop |  |  |
Goodwill |  |  |
Balance at beginning of period | 265,146 | 265,146 | 265,146
Additions | 0 |  | 0
(Deductions) | 0 |  | 0
Impairment | (211,973) |  | 0
Foreign Exchange Translation | 0 |  | 0
Balance at end of period | 53,173 |  | 265,146
Applications | Mosaic Group |  |  |
Goodwill |  |  |
Balance at beginning of period | 239,602 | 239,746 | 239,746
Additions | 0 |  | 0
(Deductions) | 0 |  | 0
Impairment | 0 |  | 0
Foreign Exchange Translation | (134) |  | (144)
Balance at end of period | 239,468 |  | 239,602
Emerging & Other |  |  |
Goodwill |  |  |
Balance at beginning of period | 8,449 | $ 7,002 | 7,002
Additions | 416,797 |  | 4,765
(Deductions) | 0 |  | 0
Impairment |  |  | (3,318)
Balance at end of period | $ 425,246 |  | $ 8,449

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