Fair Value Measures - Level 3 Unobservable Inputs (Details)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value, Unobservable Input, Level 3, Oil Price Range	$29 to $60
Fair Value, Unobservable Input, Level 3, Gas Price Range	$2.03 to $2.52
Fair Value, Unobservable Input, Level 3, NGL Price Range, % of Oil Price	24% to 31%
Fair Value, Unobservable Input, Level 3, % of PDP Reserves Adjusted	1
Fair Value, Unobservable Input, Level 3, % of PDN Reserves Adjusted	0.95
Fair Value, Unobservable Input, Level 3, Discount Rate	0.11