Derivatives (Schedule of Outstanding Derivatives Entered Into to Hedge Inventory or Fixed Price Purchase Commitments) (Details) - 3 months ended Mar. 31, 2023 gal in Thousands, bbl in Thousands, T in Thousands, MMBTU in Thousands	bbl	$ / bbl	MMBTU	$ / MMBTU	T	$ / T	gal	$ / gal
Designated as hedges under accounting rules | Sell (Short) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	282
Weighted average contract price | $ / bbl		73.87
Designated as hedges under accounting rules | Buy (Long) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	0
Weighted average contract price | $ / bbl		0
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	180
Weighted average contract price | $ / bbl		72.05
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Natural Gas
Derivative [Line Items]
Contract volumes (bbls)	160
Contract volume (MMBTU) | MMBTU			210
Weighted average contract price		0.69		2.20
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Fuel Oil
Derivative [Line Items]
Contract volumes (MT) | T					0
Weighted average contract price (MT) | $ / T						0
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Swaps | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU			0
Weighted average contract price | $ / MMBTU				0
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Differentials | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	40
Weighted average contract price | $ / bbl		(0.50)
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Commodity Option | Natural Gas and Natural Gas Liquids
Derivative [Line Items]
Contract volumes (bbls) | gal							0
Weighted average contract price | $ / gal								0
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	117
Weighted average contract price | $ / bbl		70.46
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Natural Gas
Derivative [Line Items]
Contract volumes (bbls)	32
Contract volume (MMBTU) | MMBTU			1,656
Weighted average contract price		0.05		3.97
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Fuel Oil
Derivative [Line Items]
Contract volumes (MT) | T					46,600
Weighted average contract price (MT) | $ / T						524.49
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Swaps | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU			1,502
Weighted average contract price | $ / MMBTU				0.38
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Differentials | Crude Oil
Derivative [Line Items]
Contract volumes (bbls)	0
Weighted average contract price | $ / bbl		0
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Commodity Option | Natural Gas and Natural Gas Liquids
Derivative [Line Items]
Contract volumes (bbls) | gal							1,070
Weighted average contract price | $ / gal								0.20