Income Taxes (Reconciliation Of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Federal statutory rate	(35.00%)	35.00%
Stock options	4.60%	(0.20%)
State taxes	0.10%	2.00%
Other permanent differences	1.10%
Impact of uncertain tax positions	0.90%	0.50%
Other	0.20%	0.20%
Effective federal income tax rate	(28.10%)	37.50%