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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2012
Income Taxes [Abstract]  
Tax expense and effective tax rates
The following table sets out the tax provision (benefit) and the effective tax rates of the Company:

 
Three Months Ended
September 30,
 
 
Nine Months Ended
September 30,
 
(in thousands)
 
2012
 
 
2011
 
 
2012
 
 
2011
 
 
 
 
 
 
 
 
 
 
 
 
 
Income (loss) before income taxes
 
$
(2,356
)
 
 
$
7,029
 
 
 
$
(6,734
)
 
 
$
17,083
 
Income tax provision (benefit)
 
$
(143
)
 
 
$
(1,057
)
 
 
$
(1,418
)
 
 
$
2,246
 
Effective tax rate
 
 
6.1
 
%
 
 
(15.0
)
%
 
 
21.1
 
%
 
 
13.1
%