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Investments (Details) - USD ($) $ in Thousands	9 Months Ended
Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Investments carried at fair value	$ 3,271		$ 2,907
Dividend and interest income from investments	59
Gain (loss) on investments, net	$ 308	$ 180

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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