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Segment information - Additional Information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Segments
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Disclosure of operating segments [line items]      
Number of reportable segments | Segments 6    
Revenue   $ 617,823 $ 459,016
TURKEY      
Disclosure of operating segments [line items]      
Revenue   352,385 348,528
CANADA      
Disclosure of operating segments [line items]      
Revenue   125,282 $ 0
Two customers | TURKEY      
Disclosure of operating segments [line items]      
Revenue   280,092  
One customer | CANADA      
Disclosure of operating segments [line items]      
Revenue   $ 122,160