Property, Plant and Equipment - Summary of Oil and Natural Gas Properties (Details) - USD ($) $ in Thousands	12 Months Ended	48 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Total oil and natural gas properties not subject to depletion	$ 81,435	$ 48,464	$ 22,909	$ 158,001	$ 310,809
Non-Segment \| Ecuador
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Exploration costs	3,208	0	0	0	3,208
Colombia \| Reportable Segments
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Acquisition costs	21,773	14,115	10,700	135,202	181,790
Exploration costs	$ 56,454	$ 34,349	$ 12,209	$ 22,799	$ 125,811

The sum of the capitalized costs incurred during the period of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
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Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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