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Earnings (Loss) Per Share
 12 Months Ended
Nov. 30, 2014
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share
Earnings (Loss) Per Share
Basic and diluted earnings (loss) per share were calculated as follows (in thousands, except per share amounts):
 
Years Ended November 30,
 
2014
 
2013
 
2012
Numerator:
 
 
 
 
 
Net income (loss)
$
918,349

 
$
39,963

 
$
(58,953
)
Less: Distributed earnings allocated to nonvested restricted stock
(26
)
 
(24
)
 
—

Less: Undistributed earnings allocated to nonvested restricted stock
(2,667
)
 
(90
)
 
—

Numerator for basic earnings (loss) per share
915,656

 
39,849

 
(58,953
)
Effect of dilutive securities:
 
 
 
 
 
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes
2,667

 
2,230

 
—

Add: Undistributed earnings allocated to nonvested restricted stock
2,667

 
90

 
—

Less: Undistributed earnings reallocated to nonvested restricted stock
(2,398
)
 
(81
)
 
—

Numerator for diluted earnings (loss) per share
$
918,592

 
$
42,088

 
$
(58,953
)
Denominator:
 
 
 
 
 
Weighted average shares outstanding — basic
89,265

 
82,630

 
77,106

Effect of dilutive securities:
 
 
 
 
 
Share-based payments
1,647

 
1,885

 
—

Convertible senior notes
8,402

 
7,044

 
—

Weighted average shares outstanding — diluted
99,314

 
91,559

 
77,106

Basic earnings (loss) per share
$
10.26

 
$
.48

 
$
(.76
)
Diluted earnings (loss) per share
$
9.25

 
$
.46

 
$
(.76
)

As discussed in Note 13. Notes Payable, in 2013, we issued the 1.375% Convertible Senior Notes due 2019 that, from issuance, have been convertible into shares of our common stock at a conversion rate of 36.5297 shares for each $1,000 principal amount of the notes. Outstanding stock options to purchase 5.2 million shares of common stock were excluded from the diluted earnings per share calculation for 2014 and 2013, and all outstanding stock options were excluded from the diluted loss per share calculations for the year ended November 30, 2012 because the effect of their inclusion would be antidilutive. Contingently issuable shares associated with outstanding PSUs were not included in the earnings (loss) per share calculations for the periods presented as the vesting conditions have not been satisfied.