Equity Method Investments (Schedule Of Equity Method Investments Reconciliation) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Equity Method Investments [Roll Forward]
Beginning of year	$ 46,738,000	$ 44,876,000	$ 40,697,000
Loss from investments	(1,702,000)	1,162,000	(88,000)
Dispositions and other adjustments	(4,686,000)	700,000	4,267,000
End of year	40,350,000	46,738,000	44,876,000
RS Cogen [Member]
Increase (Decrease) in Equity Method Investments [Roll Forward]
Electricity purchased from related party	$ 3,200,000	$ 2,800,000	$ 41,100,000