v2.3.0.11
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
May 12, 2011
Prior To House Bill 1004 [Member]
May 12, 2011
After House Bill 1004 [Member]
Effective tax rate 43.20% 35.50% 36.10% 35.70% 8.50% 6.50%
Federal tax rate     35.00%      
Increase in the effective tax rate 7.70%   0.40%      
Tax expense from rate change $ 6.8