Financial Instruments and Fair Value Measurement - Schedule of Gains or Losses on Financial Instruments Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments loss (gain)	$ 2,603	$ (2,173)	$ 47,540	$ (9,417)
Unrealized PetroTal investment (gain) loss	(13,616)	1,055	(17,477)	60,124
Loss on sale of PetroTal shares	0	0	5,070	0
Financial instruments (gain) loss	(18)	405	(18)	1,162
Other financial instruments (gain) loss	(13,634)	1,460	(12,425)	61,286
Commodity price derivatives loss (gain)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments loss (gain)	2,586	(2,206)	47,435	(12,983)
Foreign currency derivatives loss
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments loss (gain)	$ 17	$ 33	$ 105	$ 3,566