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Non-operating income, net Non-operating income, net (Tables) | 12 Months Ended
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Dec. 31, 2017
Non-operating (loss) income, net [Abstract] |
Schedule of Non-operating Income, net | The following table presents the components of Non-operating income (loss), net:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (In thousands)
Interest income | $ | 17,944 |  |  | $ | 6,191 |  |  | $ | 2,128 |
Gain on sale of business | 10,421 |  |  | — |  |  | — |
Unrealized (loss) gain on contingent interest derivative on Subordinated Convertible Debentures | (893 | ) |  | 2,402 |  |  | (14,130 | )
Other, net | 154 |  |  | 1,572 |  |  | 1,337 |
Total non-operating income (loss), net | $ | 27,626 |  |  | $ | 10,165 |  |  | $ | (10,665 | )

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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- Definition Non-operating (loss) income, net [Abstract] + References No definition available. + Details
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