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Other Noncurrent Assets (Tables) | 3 Months Ended
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Mar. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Noncurrent Assets | Other noncurrent assets include the following:
| March 31, 2021 |  | March 31, 2020 |  | December 31, 2020
| (In thousands)
Identifiable intangible assets (net of accumulated amortization of $296.4 million, $258.0 million, and $286.9 million, respectively) | $ | 509,844 |  |  | $ | 534,044 |  |  | $ | 518,190 |
Deferred income taxes | 71,157 |  |  | 62,674 |  |  | 72,682 |

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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