Summary Of Significant Accounting Policies (Other Income - Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounting Policies [Abstract]
Interest income	$ 250	$ 238	$ 524	$ 496
Interest on regulatory deferrals	51	8	95	21
Equity-related AFUDC	2,203	1,355	4,237	2,746
Net loss on investments	185	154	145	(244)
Other income	366	437	654	932
Total	$ 3,055	$ 2,192	$ 5,655	$ 3,951