Commodity Derivatives (Details) - Carbon California [Member]	12 Months Ended
	Dec. 31, 2019 bbl MMBTU $ / MMBTU $ / Bbl
2019 [Member] | Oil Swaps [Member] | WTI Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	17,523	[1]
Weighted Average Price | $ / bbl	53.30	[1],[2]
2019 [Member] | Oil Swaps [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	13,805	[1]
Weighted Average Price | $ / bbl	64.87	[1]
2019 [Member] | Oil Collars [Member] | WTI Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	1,700	[1]
2019 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.50	[1],[2]
2019 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	57.35	[1],[2]
2019 [Member] | Oil Collars [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	4,500	[1]
2019 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.00	[1],[3]
2019 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	75.00	[1],[3]
2020 [Member] | Natural Gas Swaps [Member] | MMBtu [Member]
Derivative agreements details:
Crude oil, notional amount (in MMBtu) | MMBTU	12,433,000
Weighted Average Price | $ / MMBTU	2.73	[4]
2020 [Member] | Natural Gas Collars [Member] | MMBtu [Member]
Derivative agreements details:
Crude oil, notional amount (in MMBtu) | MMBTU	3,430,000
2020 [Member] | Natural Gas Collars [Member] | MMBtu [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / MMBTU	2.10	[4]
2020 [Member] | Natural Gas Collars [Member] | MMBtu [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / MMBTU	2.75	[4]
2020 [Member] | Oil Swaps [Member] | WTI Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	121,147	[1]
Weighted Average Price | $ / bbl	55.37	[1],[2]
2020 [Member] | Oil Swaps [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	207,182	[1]
Weighted Average Price | $ / bbl	64.62	[1],[3]
2020 [Member] | Oil Collars [Member] | WTI Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	28,200	[1]
2020 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.00	[1],[2]
2020 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	60.15	[1],[2]
2020 [Member] | Oil Collars [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	57,900	[1]
2020 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.00	[1],[3]
2020 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	75.00	[1],[3]
2021 [Member] | Natural Gas Swaps [Member] | MMBtu [Member]
Derivative agreements details:
Crude oil, notional amount (in MMBtu) | MMBTU	6,448,000
Weighted Average Price | $ / MMBTU	2.58	[4]
2021 [Member] | Natural Gas Collars [Member] | MMBtu [Member]
Derivative agreements details:
Crude oil, notional amount (in MMBtu) | MMBTU	1,745,000
2021 [Member] | Natural Gas Collars [Member] | MMBtu [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / MMBTU	2.25	[4]
2021 [Member] | Natural Gas Collars [Member] | MMBtu [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / MMBTU	2.75	[4]
2021 [Member] | Oil Swaps [Member] | WTI Bbl [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl		[1],[2]
2021 [Member] | Oil Swaps [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	86,341	[1]
Weighted Average Price | $ / bbl	67.12	[1],[3]
2021 [Member] | Oil Collars [Member] | WTI Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	66,200	[1]
2021 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.00	[1],[2]
2021 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	60.15	[1],[2]
2021 [Member] | Oil Collars [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	190,000	[1]
2021 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	47.00	[1],[3]
2021 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	75.00	[1],[3]
2022 [Member] | Oil Swaps [Member] | WTI Bbl [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl		[1],[2]
2022 [Member] | Oil Swaps [Member] | Brent Bbl [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl		[1],[3]
2022 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl		[1],[2]
2022 [Member] | Oil Collars [Member] | WTI Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl		[1],[2]
2022 [Member] | Oil Collars [Member] | Brent Bbl [Member]
Derivative agreements details:
Crude oil, notional amount (in Bbl) | bbl	199,900	[1]
2022 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Minimum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	50.00	[1],[3]
2022 [Member] | Oil Collars [Member] | Brent Bbl [Member] | Maximum [Member]
Derivative agreements details:
Weighted Average Price | $ / bbl	61.00	[1],[3]

[1] Includes 100% of Carbon California's outstanding derivative hedges at December 31, 2019, and not our proportionate share.

[2] NYMEX Light Sweet Crude West Texas Intermediate futures contracts for the respective period.

[3] Brent future contracts for the respective period.

[4] NYMEX Henry Hub Natural Gas futures contracts for the respective period.