Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details) - Forecast - Not Designated as Hedging Instrument	12 Months Ended
	Dec. 31, 2021 MMBTU $ / bbl $ / MMBTU bbl	Dec. 31, 2020 MMBTU $ / bbl $ / MMBTU bbl
Commodity - Oil | Swap contracts
Derivative [Line Items]
Total volume (Bbls) | bbl	0	1,303,900
Weighted average price (in dollars per share)	0	55.19
Commodity - Oil | Short
Derivative [Line Items]
Total volume (Bbls) | bbl	4,825,300	1,674,450
Weighted average price (in dollars per share)	63.62	75.98
Commodity - Oil | Short | Swap contracts
Derivative [Line Items]
Total volume (Bbls) | bbl	0	2,196,000
Weighted average price (in dollars per share)	0	56.06
Commodity - Oil | Put option | Short | Swap contracts
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	42.50
Commodity - Oil | Collar contracts with short puts (WTI, three-way collars)
Derivative [Line Items]
Total volume (Bbls) | bbl	0	13,176,000
Commodity - Oil | Collar contracts with short puts (WTI, three-way collars) | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	65.28
Commodity - Oil | Collar contracts with short puts (WTI, three-way collars) | Put option | Short
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	45.08
Commodity - Oil | Collar contracts with short puts (WTI, three-way collars) | Put option | Long
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	55.38
Commodity - Oil | Collar contracts with short puts (Brent ICE, three-way collars)
Derivative [Line Items]
Total volume (Bbls) | bbl	0	837,500
Commodity - Oil | Collar contracts with short puts (Brent ICE, three-way collars) | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	70.00
Commodity - Oil | Collar contracts with short puts (Brent ICE, three-way collars) | Put option | Short
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	50.00
Commodity - Oil | Collar contracts with short puts (Brent ICE, three-way collars) | Put option | Long
Derivative [Line Items]
Weighted average price (in dollars per share) | $ / bbl	0	58.24
Commodity - Oil | Oil contracts (Midland basis differential)
Derivative [Line Items]
Total volume (Bbls) | bbl	4,015,100	8,476,700
Weighted average price (in dollars per share) | $ / bbl	0.40
Weighted average price (in dollars per share) | $ / bbl		(1.47)
Commodity - Oil | Oil contracts (Argus Houston MEH basis differential)
Derivative [Line Items]
Total volume (Bbls) | bbl	0	1,439,205
Weighted average price (in dollars per share)	0	2.40
Commodity - Oil | Oil contracts (Argus Houston MEH swaps)
Derivative [Line Items]
Total volume (Bbls) | bbl	0	504,500
Weighted average price (in dollars per share)	0	58.22
Commodity - Natural gas | Swap contracts
Derivative [Line Items]
Weighted average price (in dollars per share)	0	2.48
Total volume (MMBtu) | MMBTU	0	3,660,000
Commodity - Natural gas | Call option | Swap contracts
Derivative [Line Items]
Weighted average price (in dollars per share)	3.09	3.50
Total volume (MMBtu) | MMBTU	7,300,000	12,078,000
Commodity - Natural gas | Collar contracts (two-way collars)
Derivative [Line Items]
Total volume (MMBtu) | MMBTU	0	3,660,000
Commodity - Natural gas | Collar contracts (two-way collars) | Long
Derivative [Line Items]
Weighted average price (in dollars per share)	0	2.50
Commodity - Natural gas | Collar contracts (two-way collars) | Call option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)	0	2.75
Commodity - Natural gas | Collar contracts (two-way collars) | Put option | Short
Derivative [Line Items]
Weighted average price (in dollars per share)	0	2.00
Commodity - Natural gas | Waha basis differential | Swap contracts
Derivative [Line Items]
Total volume (MMBtu) | MMBTU	0	21,596,000
Weighted average price (in dollars per share)	0	(1.04)