Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2021

Oil And Gas Property [Abstract]

Schedule of Asset Retirement Obligations

Asset Retirement Obligations

The discounted asset retirement obligations included in the Condensed Consolidated Balance Sheets in current and non-current liabilities, and the changes in that liability were as follows (in thousands):

	March 31, 2021
Beginning asset retirement obligations	$	442,269
Fair value of asset retirement obligations acquired		4
Obligations settled		(10,120	)
Fair value of asset retirement obligations divested		(176	)
Accretion expense		14,985
Obligations incurred		—
Changes in estimate		5,206
Ending asset retirement obligations	$	452,168
Less: Current portion		(45,478	)
Long-term portion	$	406,690