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CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Redeemable Noncontrolling Interests | Total IAC Shareholders' Equity | Common Stock Common Stock $.001 Par Value | Common Stock Class B Convertible Common Stock $.001 Par Value | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive (Loss) Income | Treasury Stock | Noncontrolling Interests | Match Group and ANGI Homeservices | Match Group and ANGI Homeservices Total IAC Shareholders' Equity | Match Group and ANGI Homeservices Additional Paid-in Capital | Match Group and ANGI Homeservices Accumulated Other Comprehensive (Loss) Income | Match Group and ANGI Homeservices Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2018 |  | $ 65,687 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Redeemable Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings |  | (1,051) |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  | 186 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  | 42 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of redeemable noncontrolling interests |  | (3,182) |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment of redeemable noncontrolling interests to fair value |  | 10,242 |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | (10) |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period at Mar. 31, 2019 |  | 71,914 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period at Dec. 31, 2018 | $ 3,551,801 |  | $ 2,843,125 | $ 262 | $ 16 | $ 12,022,387 | $ 1,258,794 | $ (128,722) | $ (10,309,612) | $ 708,676 |  |  |  |  |
Balance at beginning of period (shares) at Dec. 31, 2018 |  |  |  | 262,303,000 | 16,157,000 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings | 114,036 |  | 88,695 |  |  |  | 88,695 |  |  | 25,341 |  |  |  |  |
Other comprehensive income (loss), net of income taxes | 1,124 |  | 995 |  |  |  |  | 995 |  | 129 |  |  |  |  |
Stock-based compensation expense | 67,402 |  | 20,165 |  |  | 20,165 |  |  |  | 47,237 |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares) |  |  |  | 326,000 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes | (4,910) |  | (4,910) | $ 1 |  | (4,911) |  |  |  |  |  |  |  |  |
Adjustment of redeemable noncontrolling interests to fair value | (10,242) |  | (10,242) |  |  | (10,242) |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes |  |  |  |  |  |  |  |  |  |  | $ (147,858) | $ (157,950) | $ (158,958) | $ 1,008 | $ 10,092
Other | (17) |  | (17) |  |  | (17) |  |  |  |  |  |  |  |  |
Balance at end of period at Mar. 31, 2019 | 3,571,336 |  | 2,779,861 | $ 263 | $ 16 | 11,868,424 | 1,347,489 | (126,719) | (10,309,612) | 791,475 |  |  |  |  |
Balance at end of period (shares) at Mar. 31, 2019 |  |  |  | 262,629,000 | 16,157,000 |  |  |  |  |  |  |  |  |  |
Balance at beginning of period at Dec. 31, 2019 | 44,527 | 44,527 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Redeemable Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings |  | (1,462) |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  | 99 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of redeemable noncontrolling interests |  | (3,165) |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment of redeemable noncontrolling interests to fair value |  | 2,418 |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period at Mar. 31, 2020 | 42,431 | $ 42,431 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period at Dec. 31, 2019 | 3,898,318 |  | 2,928,042 | $ 263 | $ 16 | 11,683,799 | 1,689,925 | (136,349) | (10,309,612) | 970,276 |  |  |  |  |
Balance at beginning of period (shares) at Dec. 31, 2019 |  |  |  | 263,230,000 | 16,157,000 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings | (181,181) |  | (211,040) |  |  |  | (211,040) |  |  | 29,859 |  |  |  |  |
Other comprehensive income (loss), net of income taxes | (26,204) |  | (21,339) |  |  |  |  | (21,339) |  | (4,865) |  |  |  |  |
Stock-based compensation expense | 56,085 |  | 11,499 |  |  | 11,499 |  |  |  | 44,586 |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares) |  |  |  | 272,000 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes | (20,515) |  | (20,515) | $ 1 |  | (20,516) |  |  |  |  |  |  |  |  |
Adjustment of redeemable noncontrolling interests to fair value | (2,418) |  | (2,418) |  |  | (2,418) |  |  |  |  |  |  |  |  |
Issuance of common stock pursuant to stock-based awards, net of withholding taxes |  |  |  |  |  |  |  |  |  |  | (148,604) | (139,162) | (139,565) | $ 403 | $ (9,442)
Purchase of treasury stock |  |  |  |  |  |  |  |  |  |  | $ (120,658) | $ (120,658) | $ (120,658) |  |
Other | 1 |  | 1 |  |  | 1 |  |  |  |  |  |  |  |  |
Balance at end of period at Mar. 31, 2020 | $ 3,454,824 |  | $ 2,424,410 | $ 264 | $ 16 | $ 11,412,142 | $ 1,478,885 | $ (157,285) | $ (10,309,612) | $ 1,030,414 |  |  |  |  |
Balance at end of period (shares) at Mar. 31, 2020 |  |  |  | 263,502,000 | 16,157,000 |  |  |  |  |  |  |  |  |  |

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