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Investment And Other Gains Investment And Other Gains (Tables)

12 Months Ended

Dec. 31, 2017

Investment And Other Gains [Abstract]

Schedule of Investment And Other Gains [Table Text Block]

The following table summarizes our investment and other gains (in thousands):

	Year Ended December 31,
	2017				2016				2015
Gains on sales of marketable securities	10,038				29,673				23,529
Gain on sale of real estate	50				4,582				1,126
Other gains	—				1,657				—
	$	10,088			$	35,912			$	24,655

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Investment And Other Gains [Abstract]

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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.

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