XML 36 R26.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investment in Equity Securities - Additional Information (Details) - Investee - USD ($)
shares in Millions, $ in Millions
9 Months Ended
Sep. 30, 2017
Apr. 14, 2017
Schedule Of Cost Method Investments [Line Items]    
Amount invested in minority equity investment   $ 2.9
Preferred stock received in minority equity investment, shares   4.7
Percentage of outstanding voting securities on a fully diluted basis   15.00%
Investment in equity securities, additional information There have been no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment.