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Investment And Other Gains | 6 Months Ended
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Jun. 30, 2018
Investment And Other Gains [Abstract] |
Investment And Other Gains | INVESTMENT AND OTHER GAINS The following table summarizes our investment and other gains (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Gain on sale of real estate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 50 |
Gain on sales of marketable securities | — |  |  | — |  |  | — |  |  | 10,038 |
| $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 10,088 |
In January and February 2017, we recognized gains of $10,038,000 on sales totaling $11,718,000 of marketable securities with a carrying value $11,745,000 and an adjusted cost of $1,680,000 at December 31, 2016. Total proceeds of $18,182,000 from sales of marketable securities for 2017 included settlements occurring in 2017 of $6,464,000 that resulted from sales in December 2016.

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