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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 14,542	$ 14,310
Accruals	12,218	2,993
Asset retirement obligations	41,382	26,383
Tax credits and federal return to provision	47,803	0
Interest limitation carryforward	13,892	7,486
Other	5,154	2,033
Total deferred tax assets	134,991	53,205
Deferred tax liabilities:
Book tax differences in property basis	(143,896)	(95,348)
Derivative instruments	(152)	(3,692)
Total deferred tax liabilities	(144,048)	(99,040)
Net deferred tax asset (liability)	$ (9,057)	$ (45,835)

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