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Income Taxes
6 Months Ended
Jun. 30, 2011
Income Taxes [Abstract]  
Income Taxes
(10)
Income Taxes

 
The effective tax rate was 31.6% and 27.0% for the second quarter of 2011 and 2010, respectively, and 32.8% and 28.9% for the six months ended June 30, 2011 and 2010, respectively.  In 2011 and 2010, rates were lower than the statutory rate of 35%, primarily due to gains and losses from the change in fair value of outstanding warrants for the purchase of Class A common stock.  The change in fair value of outstanding warrants, which is not taxable, resulted in an increase to income, as previously noted, of $1.2 million and $252,000 for the six months ended June 30, 2011 and 2010, respectively.