Description of Business and Significant Accounting Policies - Schedule of Accounts Payable (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Trade payables	$ 12,485	$ 4,092
Revenue payable	10,171	10,692
Prepayments from partners	1,062	2,193
Miscellaneous payables	334	227
Total Accounts payable	$ 24,052	$ 17,204