Note 6 - Non-operating Income - Summary of Non-operating Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity in earnings of unconsolidated investments	$ 3,019	$ 2,747	$ 8,448	$ 7,548
Dividends and net realized gains on sales of securities	2,084	2,049	5,997	5,911
Interest income	1,375	1,867	4,426	5,502
Gains on acquisitions of equity method investments	0	0	1,707	1,975
Total non-operating income	$ 6,478	$ 6,663	$ 20,578	$ 20,936

The amount of dividends and other net realized gains and losses resulting from the sale of securities.

No definition available.

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The amount of gain (loss) recognized upon the acquisition of equity method investment.

+ References

No definition available.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The net amount of nonoperating interest income (expense).

+ References

No definition available.

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Amount of income (expense) related to nonoperating activities, classified as other.

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