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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Effect of potentially dilutive stock outstanding
The effect of potentially dilutive stock outstanding as of June 30, 2013 and 2012 are as follows (in thousands, except per share data):
 
Three months ended June 30, 2013
 
Six months ended June 30, 2013
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per-Share
Amount
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per-Share
Amount
Basic EPS
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
$
(35,040
)
 
99,833

 
$
(0.35
)
 
$
(22,770
)
 
94,918

 
$
(0.24
)
Effect of Dilutive Securities
 
 
 
 
 
 
 
 
 
 
 
Equity awards
—

 
—

 
 
 
—

 
—

 
 
Diluted EPS
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
$
(35,040
)
 
99,833

 
$
(0.35
)
 
$
(22,770
)
 
94,918

 
$
(0.24
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Three months ended June 30, 2013
 
Six months ended June 30, 2012
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per-Share
Amount
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per-Share
Amount
Basic EPS
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
$
22,973

 
89,631

 
$
0.26

 
$
26,948

 
89,611

 
$
0.30

Effect of Dilutive Securities
 
 
 
 
 
 
 
 
 
 
 
Equity awards
—

 
102

 
 
 
—

 
166

 
 
Diluted EPS
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) available to common stockholders
$
22,973

 
89,733

 
$
0.26

 
$
26,948

 
89,777

 
$
0.30