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SEGMENT INFORMATION - Reconciliation of Operating Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | $ 185,852 | $ 172,832 | $ 420,035 | $ 431,219
Stock-Based Compensation Expense | 50,053 | 55,363 | 179,922 | 172,006
Depreciation | 23,090 | 18,925 | 63,152 | 56,987
Amortization of Intangibles | 23,186 | 20,152 | 65,576 | 60,293
Interest expense | (42,132) | (27,610) | (110,481) | (81,471)
Other income, net | 1,229 | 8,113 | 47,852 | 174,635
Earnings before income taxes | 144,949 | 153,335 | 357,406 | 524,383
Income tax benefit | 14,823 | 18,242 | 62,142 | 15,887
Net earnings | 159,772 | 171,577 | 419,548 | 540,270
Net earnings attributable to noncontrolling interests | (31,228) | (25,803) | (88,842) | (105,061)
Net earnings attributable to IAC shareholders | 128,544 | 145,774 | 330,706 | 435,209
Operating segments | Match Group |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | 176,604 | 139,895 | 468,330 | 402,293
Stock-Based Compensation Expense | 20,805 | 16,141 | 70,817 | 49,810
Depreciation | 8,081 | 8,513 | 24,109 | 25,059
Amortization of Intangibles | 641 | 435 | 1,464 | 914
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 55 | 0 | 265
Adjusted EBITDA | 206,131 | 165,039 | 564,720 | 478,341
Operating segments | ANGI Homeservices |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | 24,726 | 33,515 | 32,488 | 46,021
Stock-Based Compensation Expense | 8,784 | 22,474 | 45,586 | 69,433
Depreciation | 11,244 | 6,100 | 27,039 | 18,170
Amortization of Intangibles | 14,169 | 15,611 | 42,421 | 47,695
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 0 | 0 | 0
Adjusted EBITDA | 58,923 | 77,700 | 147,534 | 181,319
Operating segments | Vimeo |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | (11,155) | (6,161) | (40,555) | (25,502)
Stock-Based Compensation Expense | 0 | 0 | 0 | 0
Depreciation | 39 | 291 | 364 | 947
Amortization of Intangibles | 3,119 | 1,641 | 6,530 | 4,911
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 0 | 0 | 0
Adjusted EBITDA | (7,997) | (4,229) | (33,661) | (19,644)
Operating segments | Dotdash |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | 3,695 | 2,416 | 13,752 | 6,946
Stock-Based Compensation Expense | 0 | 0 | 0 | 0
Depreciation | 216 | 246 | 660 | 741
Amortization of Intangibles | 3,115 | 409 | 8,139 | 1,227
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 0 | 0 | 0
Adjusted EBITDA | 7,026 | 3,071 | 22,551 | 8,914
Operating segments | Applications |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | 39,099 | 33,041 | 85,422 | 91,579
Stock-Based Compensation Expense | 0 | 0 | 0 | 0
Depreciation | 331 | 617 | 1,139 | 2,145
Amortization of Intangibles | 2,142 | 1,331 | 6,872 | 3,421
Acquisition-related Contingent Consideration Fair Value Adjustments | (16,139) | 0 | (12,993) | 0
Adjusted EBITDA | 25,433 | 34,989 | 80,440 | 97,145
Operating segments | Emerging & Other |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | (1,821) | 10,893 | (6,130) | 23,465
Stock-Based Compensation Expense | 0 | 323 | 0 | 1,747
Depreciation | 292 | 294 | 839 | 1,396
Amortization of Intangibles | 0 | 725 | 150 | 2,125
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 0 | 0 | 0
Adjusted EBITDA | (1,529) | 12,235 | (5,141) | 28,733
Corporate |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Operating Income (Loss) | (45,296) | (40,767) | (133,272) | (113,583)
Stock-Based Compensation Expense | 20,464 | 16,425 | 63,519 | 51,016
Depreciation | 2,887 | 2,864 | 9,002 | 8,529
Amortization of Intangibles | 0 | 0 | 0 | 0
Acquisition-related Contingent Consideration Fair Value Adjustments | 0 | 0 | 0 | 0
Adjusted EBITDA | $ (21,945) | $ (21,478) | $ (60,751) | $ (54,038)

X
- Definition The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, and (ii) gains and losses recognized on changes in the fair value of contingent consideration arrangements. The Company believes this measure is useful for analysts and investors as this measure allows a more meaningful comparison between our performance and that of our competitors. Moreover, our management uses this measure internally to evaluate the performance of our business as a whole and our individual business segments, and this measure is one of the primary metrics by which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature, and we believe that by excluding these items, Adjusted EBITDA corresponds more closely to the cash operating income generated from our business, from which capital investments are made and debt is serviced. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses. + References No definition available. + Details
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