Transactions With Related Parties (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) Partnerships	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Number of oil and gas limited partnerships for employee investment | Partnerships	13
Repurchase of limited units outstanding amount		$ 600,000
G. Bailey Peyton IV
Related Party Transaction [Line Items]
Payments for royalties	$ 200,000	$ 400,000
Peyton Royalties, LP | G. Bailey Peyton IV
Related Party Transaction [Line Items]
Related party ownership percentage	99.50%