Goodwill (Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Goodwill [Line Items]
Balance at December 31, 2011	$ 26,944
Goodwill acquired	12,254
Reclassifications to utility plant acquisition adjustment	(425)
Other	11
Balance at June 30, 2012	38,784	26,944
Goodwill by segment for discontinued operations		12,316
Regulated Segment [Member]
Goodwill [Line Items]
Balance at December 31, 2011	22,823
Goodwill acquired	12,254
Reclassifications to utility plant acquisition adjustment	(425)
Other	11
Balance at June 30, 2012	34,663
Other Segment [Member]
Goodwill [Line Items]
Balance at June 30, 2012	$ 4,121	$ 4,121