Summary Of Significant Accounting Policies (Reclassifications Out of Accumulated Other Comprehensive Loss) (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
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before income taxes	$ 86		$ (5,540)		$ (156,513)		$ (10,999)
Income tax expense (benefit)	(31)		2,092		85,741		4,178
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	55		(3,448)		(70,772)		(6,821)
Tax benefit (expense) (a)	(7,301)		(3,367)		(51,274)		(41,929)
Net income	10,471		11,931		160,034		80,762
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income Loss Reclassification Adjustment From AOCI For Realized Losses on Sale of Securities Before Tax	0		0		(735)	[1]	0	[1]
Income (loss) before income taxes	0		2		(732)		20
Income tax expense (benefit)	0		(1)		272	[1]	(8)	[1]
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0		1		(460)		12
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0		2		3	[1]	20	[1]
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(172)		(283)		(516)		(848)
Tax benefit (expense) (a)	60		99		181		297
Net income	(112)		(184)		(335)		(551)
Amortization of net loss	(1,951)	[2]	(4,891)	[2]	(5,855)	[2]	(14,673)	[2]
Adjustment due to effects of regulation	$ 1,779	[2]	$ 4,608	[2]	$ 5,339	[2]	$ 13,825	[2]

[1] These amounts were included as part of net income from discontinued operations for all periods presented (see Note 5 for additional details).

[2] These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 7 for additional details).