Federal Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Effective income tax rate	28.70%	29.60%
Federal income tax rate	34.00%
Operating Loss Carryforwards	$ 6.0	$ 5.7
Minimum [Member]
Open Tax Year	2009
Operating Loss Carryforwards, Expiration Dates	2021
Maximum [Member]
Open Tax Year	2012