Three Months Ended September 30,

Nine Months Ended September 30,

2012

2011

2012

2011

(unaudited, in thousands, except per share
amounts)

Numerator:

Net loss available to common stockholders

$

(4,813

)

$

(134,481

)

$

(21,320

)

$

(150,081

)

Denominator:

Weighted average shares outstanding - basic

35,879

35,728

35,838

35,590

Potential common shares - options (treasury stock method)

—

Weighted average shares outstanding - diluted

35,879

35,728

35,838

35,590

Shares excluded (anti-dilutive)

—

56

3

231

Shares excluded due to an exercise price greater than weighted average stock price for the period

1,453

2,237

1,453

1,738

Net loss per common share:

Basic

($

0.13

)

($

3.76

)

($

0.59

)

($

4.22

)

Diluted

($

0.13

)

($

3.76

)

($

0.59

)

($

4.22

)