v3.10.0.1
Financial investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Financial investments [Abstract]    
Fair Value through OCI (Investment in Ten West link) $ 3,157 $ 2,088
Derivative assets 15,350 8,230
Other receivable accounts at amortized cost 34,440 34,924
Total non-current financial investments 52,947 45,242
Fair value through profit or loss 0 1,715
Contracted concessional financial assets 145,807 131,066
Other receivable accounts at amortized cost 91,273 77,357
Total current financial investments $ 237,080 $ 210,138