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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income per share:
 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2013
 
2012
 
2013
 
2012
Numerator:
 
 
 
 
 
 
 
 
Basic
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(15,711
)
 
$
(6,619
)
 
$
(23,101
)
 
$
49,630

Undistributed earnings allocated to participating securities
 
—

 
—

 
—

 
(1,641
)
Total dividends declared / paid
 
(6,243
)
 
—

 
(12,392
)
 
—

Dividends attributable to common stockholders
 
6,050

 
—

 
12,035

 
—

Net income (loss) attributable to common stockholders – basic
 
$
(15,904
)
 
$
(6,619
)
 
$
(23,458
)
 
$
47,989

 
 
 
 
 
 
 
 
 
Diluted
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(15,711
)
 
$
(6,619
)
 
$
(23,101
)
 
$
49,630

Undistributed earnings allocated to participating securities
 
—

 
—

 
—

 
(1,630
)
Total dividends declared / paid
 
(6,243
)
 
—

 
(12,392
)
 
—

Dividends attributable to common stockholders
 
6,050

 
—

 
12,035

 
—

Net income (loss) attributable to common stockholders – diluted
 
$
(15,904
)
 
$
(6,619
)
 
$
(23,458
)
 
$
48,000

 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic
 
48,330,149

 
48,332,878

 
48,068,038

 
46,886,820

Effect of potentially dilutive securities:
 
 
 
 
 
 
 
 
Common stock options and restricted stock units
 
199,956

 
308,496

 
220,899

 
352,315

Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted
 
48,530,105

 
48,641,374

 
48,288,937

 
47,239,135

 
 
 
 
 
 
 
 
 
Basic net income (loss) per common share
 
$
(0.33
)
 
$
(0.14
)
 
$
(0.49
)
 
$
1.02

Diluted net income (loss) per common share
 
$
(0.33
)
 
$
(0.14
)
 
$
(0.49
)
 
$
1.02
Impact of the Revision to the Comparable Prior Period Earnings (Loss) Per Share Calculations Using the Two-Class Method [Table Text Block]
The impact of the revision to the comparable prior period earnings (loss) per share calculations using the two-class method were as follows:

 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2012
 
2012
Numerator:
 
 
 
 
Net income (loss) attributable to common stockholders – basic and diluted - As Reported
 
$
(6,619
)
 
$
49,630

Net income (loss) attributable to common stockholders – basic - As Adjusted
 
$
(6,619
)
 
$
47,989

Net income (loss) attributable to common stockholders – diluted - As Adjusted
 
$
(6,619
)
 
$
48,000

 
 
 
 
 
Denominator:
 
 
 
 
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic - As Reported
 
48,332,878

 
46,886,820

Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic - As Adjusted
 
48,332,878

 
46,886,820

Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted - As Reported
 
48,332,878

 
47,795,819

Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted - As Adjusted
 
48,641,374

 
47,239,135

 
 
 
 
 
Basic net income (loss) per common share - As Reported
 
$
(0.14
)
 
$
1.06

Basic net income (loss) per common share - As Adjusted
 
$
(0.14
)
 
$
1.02

Diluted net income (loss) per common share - As Reported
 
$
(0.14
)
 
$
1.04

Diluted net income (loss) per common share - As Adjusted
 
$
(0.14
)
 
$
1.02