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Other Noncurrent Assets | 9 Months Ended
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Sep. 30, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Other Noncurrent Assets | Other Noncurrent Assets Other noncurrent assets include the following:
| September 30, 2020 |  | September 30, 2019 |  | December 31, 2019
| (In thousands)
Identifiable intangible assets (net of accumulated amortization of $277.5 million, $238.1 million, and $248.0 million, respectively) | $ | 519,861 |  |  | $ | 552,332 |  |  | $ | 553,114 |
Deferred income taxes | 60,850 |  |  | 63,551 |  |  | 67,900 |
Mattel's amortizable intangible assets primarily consist of trademarks. Mattel tests its amortizable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. Mattel's amortizable intangible assets were not impaired during the three and nine months ended September 30, 2020 and 2019.

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