Derivatives and Fair Value (Summary of Commodity Swaps) (Details)	3 Months Ended
Mar. 31, 2020 bbl
Derivatives and Fair Value [Abstract]
Barrels	172,160

Nominal volume used to calculate payments on a derivative instrument.

No definition available.

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration