Derivative And Financial Instruments (Hedges In Place) (Details)	3 Months Ended
	Mar. 31, 2020 $ / bbl bbl
West Texas Intermediate 2020 Swap Quarter 2
Derivative [Line Items]
Volume (in Bbls) | bbl	50,960
Average Price | $ / bbl	53.50
West Texas Intermediate 2020 Swap Quarter 3
Derivative [Line Items]
Volume (in Bbls) | bbl	49,224
Average Price | $ / bbl	53.50
West Texas Intermediate 2020 Swap Quarter 4
Derivative [Line Items]
Volume (in Bbls) | bbl	47,624
Average Price | $ / bbl	53.50
West Texas Intermediate 2020
Derivative [Line Items]
Volume (in Bbls) | bbl	147,808
Average Price | $ / bbl	53.50
NYMEX 2020 Swap Quarter 2
Derivative [Line Items]
Volume (in Bbls) | bbl	102,008
Average Price | $ / bbl	2.85
NYMEX 2020 Swap Quarter 3
Derivative [Line Items]
Volume (in Bbls) | bbl	99,136
Average Price | $ / bbl	2.85
NYMEX 2020 Swap Quarter 4
Derivative [Line Items]
Volume (in Bbls) | bbl	96,200
Average Price | $ / bbl	2.85
NYMEX 2020
Derivative [Line Items]
Volume (in Bbls) | bbl	297,344
Average Price | $ / bbl	2.85