v2.4.0.6
Income Taxes (Details 1)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Reconciliations of the statutory federal income tax rate to our effective tax      
Federal statutory rate 35.00% 35.00% 35.00%
State income taxes, net of federal benefit 3.20% 5.40% 3.40%
Non-deductible expenses 1.60% 2.10% 2.60%
Uncertain tax position taxes and interest (2.50%) 0.30% 0.80%
Other, net (2.30%) (0.70%) 0.80%
Effective income tax rate 35.00% 42.10% 42.60%