Nature Of Operations And Critical Accounting Policies And Estimates (Narrative) (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Cost adjustment period	2 years
Company's Revenues [Member]
Significant Accounting Policies [Line Items]
Percentage of regulatory revenue	5.00%	3.00%
Customer Relationships [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	8 years		8 years