Note Receivable (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Feb. 02, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2022
Financing Receivable, Past Due [Line Items]
Amount of notes receivable		$ 2,600,000			$ 2,600,000
Cost and Timing of Decommissioning		53,000,000.0			53,000,000.0
Capitalized Costs Asset		38,200,000			38,200,000
Gain recognized from changes in cost and timing					17,400,000
Amount of notes receivable net		2,600,000			2,600,000
Change In Gross Amount Of Sellers Obligation		106,900			106,900
Present value of sellers obligation		65,100			$ 65,100
Notes Receivable, Seller Obligation [Member]
Financing Receivable, Past Due [Line Items]
Interest rate percentage to record present value of notes receivable					5.60%
Company recorded interest income	$ 400,000	$ 1,000,000.0	$ 1,900,000	$ 1,200,000	$ 2,000,000.0