Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2012
Income Tax Disclosure [Abstract]  
Reconciliation of effective income tax rate
The following table shows the Company's effective income tax rate for the three and nine months ended September 30, 2012 and 2011:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2012
 
2011
 
2012
 
2011
Income before provision for income taxes
$
6,198,330

 
$
5,370,565

 
$
16,867,740

 
$
13,519,806

Income tax expense
(2,381,394
)
 
(1,991,064
)
 
(6,336,180
)
 
(5,003,592
)
Effective tax rate
38.4
%
 
37.1
%
 
37.6
%
 
37.0
%


The increase in our effective tax rate was due to slightly higher state rates upon filing the 2011 state tax returns in the third quarter of 2012, as a result of apportionment in high tax states.