Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments And Contingencies [Abstract]

Schedule Of Costs Of Fuel Purchased And Transported As A Percentage Of Total Fuel Costs

	2016		2015		2014
Hilcorp	56.9	%	30.3	%	50.4	%
ConocoPhillips (COP)	32.0	%	58.7	%	43.6	%
AIX Energy	0.7	%	4.7	%	0.0	%
ENSTAR	4.7	%	3.3	%	2.0	%
Harvest (Hilcorp) Pipeline	3.2	%	1.6	%	3.0	%
Miscellaneous	2.5	%	1.4	%	1.0	%