Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details) - Forecast - Not Designated as Hedging Instrument	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2022 bbl	Dec. 31, 2020 MMBTU $ / bbl $ / MMBTU bbl	Dec. 31, 2020 $ / bbl $ / MMBTU bbl	Dec. 31, 2021 MMBTU $ / MMBTU $ / bbl bbl
Commodity - Oil | Call option | Short
Derivative [Line Items]
Total volume (Bbls) | bbl		920,000		4,825,300
Weighted average price (in dollars per share)		55.00	55.00	63.62
Commodity - Oil | Call option | Long
Derivative [Line Items]
Total volume (Bbls) | bbl	0		920,000
Weighted average price (in dollars per share) | $ / bbl		67.50	67.50	0
Commodity - Oil | Put option | Short
Derivative [Line Items]
Total volume (Bbls) | bbl	0		1,104,000
Weighted average price (in dollars per share) | $ / bbl		42.50	42.50	0
Commodity - Oil | Collar Contracts
Derivative [Line Items]
Total volume (Bbls) | bbl	0		2,863,040
Commodity - Oil | Collar Contracts | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl		45.00	45.00	0
Commodity - Oil | Collar Contracts | Put option | Long
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl		35.00	35.00	0
Commodity - Oil | Swap contracts
Derivative [Line Items]
Total volume (Bbls) | bbl		6,291,880		0
Weighted average price (in dollars per share)		42.08	42.08	0
Commodity - Oil | Swap contracts | Oil contracts (WTI Calendar Month Average Roll)
Derivative [Line Items]
Total volume (Bbls) | bbl		3,864,000		0
Weighted average price (in dollars per share)		(2.75)	(2.75)	0
Commodity - Oil | Swap contracts | Oil contracts (Brent ICE)
Derivative [Line Items]
Total volume (Bbls) | bbl		184,000		1,272,450
Weighted average price (in dollars per share) | $ / bbl		46.15	46.15	38.24
Commodity - Oil | Swap contracts | Oil contracts (Midland basis differential)
Derivative [Line Items]
Total volume (Bbls) | bbl		4,609,200		4,015,100
Weighted average price (in dollars per share) | $ / bbl				0.40
Weighted average price (in dollars per share) | $ / bbl		(0.98)	(0.98)
Commodity - Oil | Swap contracts | Oil contracts (Argus Houston MEH basis differential)
Derivative [Line Items]
Total volume (Bbls) | bbl		3,256,004		0
Weighted average price (in dollars per share)		0.06	0.06	0
Commodity - Oil | Swap contracts | Oil contracts (Argus Houston MEH swaps)
Derivative [Line Items]
Total volume (Bbls) | bbl		368,000		2,969,050
Weighted average price (in dollars per share)		57.71	57.71	39.48
Commodity - Natural gas | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)		3.50	3.50	3.09
Total volume (MMBtu) | MMBTU		6,072,000		7,300,000
Commodity - Natural gas | Collar contracts (three-way collars)
Derivative [Line Items]
Total volume (MMBtu) | MMBTU		2,755,000		1,350,000
Commodity - Natural gas | Collar contracts (three-way collars) | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)		2.73	2.73	2.70
Commodity - Natural gas | Collar contracts (three-way collars) | Put option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)		2.00	2.00	2.00
Commodity - Natural gas | Collar contracts (three-way collars) | Put option | Long
Derivative [Line Items]
Weighted average price (in dollars per share)		2.47	2.47	2.42
Commodity - Natural gas | Collar contracts (two-way collars)
Derivative [Line Items]
Total volume (MMBtu) | MMBTU		1,525,000		7,750,000
Commodity - Natural gas | Collar contracts (two-way collars) | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)		3.25	3.25	2.93
Commodity - Natural gas | Collar contracts (two-way collars) | Put option | Long
Derivative [Line Items]
Weighted average price (in dollars per share)		2.67	2.67	2.55
Commodity - Natural gas | Swap contracts
Derivative [Line Items]
Weighted average price (in dollars per share)		2.21	2.21	2.66
Total volume (MMBtu) | MMBTU		5,530,000		12,923,000
Commodity - Natural gas | Swap contracts | Waha Basis Differential
Derivative [Line Items]
Total volume (MMBtu) | MMBTU		12,885,000		0
Weighted average price (in dollars per share)		(0.92)	(0.92)	0
Commodity - Natural gas liquids | Swap contracts | NGL contracts (OPIS Mont Belvieu Purity Ethane)
Derivative [Line Items]
Total volume (Bbls) | bbl		0		1,825,000
Weighted average price (in dollars per share)		0	0	7.62