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Earnings Per Share (Tables)
 6 Months Ended
May 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
Basic and diluted earnings (loss) per share were calculated as follows (in thousands, except per share amounts):
 
 
Three Months Ended May 31,
 
Six Months Ended May 31,
 
 
2019
 
2018
 
2019
 
2018
Numerator:
 
 
 
 
 
 
 
 
Net income (loss)
 
$
47,461

 
$
57,308

 
$
77,472

 
$
(13,947
)
Less: Distributed earnings allocated to nonvested restricted stock
 
(14
)
 
(12
)
 
(27
)
 
—

Less: Undistributed earnings allocated to nonvested restricted stock
 
(280
)
 
(310
)
 
(456
)
 
—

Numerator for basic earnings (loss) per share
 
47,167

 
56,986

 
76,989

 
(13,947
)
Effect of dilutive securities:
 
 
 
 
 
 
 
 
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes
 
—

 
796

 
541

 
—

Add: Undistributed earnings allocated to nonvested restricted stock
 
280

 
310

 
456

 
—

Less: Undistributed earnings reallocated to nonvested restricted stock
 
(265
)
 
(269
)
 
(421
)
 
—

Numerator for diluted earnings (loss) per share
 
$
47,182

 
$
57,823

 
$
77,565

 
$
(13,947
)
 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Weighted average shares outstanding — basic
 
87,641

 
87,581

 
87,310

 
87,370

Effect of dilutive securities:
 
 
 
 
 
 
 
 
Share-based payments
 
4,725

 
5,176

 
4,463

 
—

Convertible senior notes
 
—

 
8,402

 
2,862

 
—

Weighted average shares outstanding — diluted
 
92,366

 
101,159

 
94,635

 
87,370

Basic earnings (loss) per share
 
$
.54

 
$
.65

 
$
.88

 
$
(.16
)
Diluted earnings (loss) per share
 
$
.51

 
$
.57

 
$
.82

 
$
(.16
)