Summary Of Significant Accounting Policies (Other Income - Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accounting Policies [Abstract]
Interest income	$ 154	$ 124	$ 678	$ 620
Interest on regulatory deferrals	59	27	154	48
Equity-related AFUDC	2,189	1,595	6,426	4,341
Net loss on investments	(27)	(1,299)	118	(1,543)
Other income	233	41	887	973
Total	$ 2,608	$ 488	$ 8,263	$ 4,439