Investments	9 Months Ended
Sep. 30, 2016
Investments, All Other Investments [Abstract]
Investments	Investments Investments in Privately-held Companies As of September 30, 2016 and December 31, 2015, we held non-marketable equity investments of approximately $36.1 million and $33.6 million, respectively, in privately-held companies which are accounted for under the cost method. During the prior quarter ended June 30, 2016 we made an additional investment of $2.5 million in one of these companies, which was accounted for under the cost method. There were no impairments recognized on our investments for the nine months ended September 30, 2016.

Investments

9 Months Ended

Sep. 30, 2016

Investments, All Other Investments [Abstract]

Investments in Privately-held Companies

As of September 30, 2016 and December 31, 2015, we held non-marketable equity investments of approximately $36.1 million and $33.6 million, respectively, in privately-held companies which are accounted for under the cost method. During the prior quarter ended June 30, 2016 we made an additional investment of $2.5 million in one of these companies, which was accounted for under the cost method. There were no impairments recognized on our investments for the nine months ended September 30, 2016.