XML 267 R55.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 23, 2016
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Ownership Percentage     25.00%
Equity investment (see Note 6) $ 2,549 $ 2,500 $ 2,500