Income Tax (details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal Statutory Tax Rate	35.00%	35.00%
Current State Income Tax, Net Of Federal Tax Benefit	4.60%	4.50%
Amortization Of Investment And Energy Tax Credits	(0.30%)	(0.30%)
Differences Required To Be Flowed Through By Regulatory Commissions	2.20%	1.40%
Gains On Company And Trust Owned Life Insurance	(1.30%)	(1.20%)
One-Time Tax Adjustment	0.00%	4.80%
Other - Net	0.60%	0.90%
Effective Income Tax Rate	40.80%	45.10%
Income Tax Disclosure [Abstract]
One-time, After-tax Charge		$ 2,700,000.0