Investments Carried at Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Investments carried at fair value	$ 2,889		$ 2,654
Dividend and interest income from investments	161
Net unrealized gains recognized	$ 180	$ (190)