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Earnings Per Share (Tables)
 12 Months Ended
Nov. 30, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
Basic and diluted earnings per share were calculated as follows (in thousands, except per share amounts):
 
Years Ended November 30,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net income
$
170,365

 
$
180,595

 
$
105,615

Less: Distributed earnings allocated to nonvested restricted stock
(51
)
 
(56
)
 
(45
)
Less: Undistributed earnings allocated to nonvested restricted stock
(927
)
 
(1,121
)
 
(508
)
Numerator for basic earnings per share
169,387

 
179,418

 
105,062

Effect of dilutive securities:
 
 
 
 
 
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes
3,190

 
2,654

 
2,667

Add: Undistributed earnings allocated to nonvested restricted stock
927

 
1,121

 
508

Less: Undistributed earnings reallocated to nonvested restricted stock
(805
)
 
(979
)
 
(453
)
Numerator for diluted earnings per share
$
172,699

 
$
182,214

 
$
107,784

Denominator:
 
 
 
 
 
Weighted average shares outstanding — basic
87,773

 
85,842

 
85,706

Effect of dilutive securities:
 
 
 
 
 
Share-based payments
4,884

 
4,072

 
2,170

Convertible senior notes
8,402

 
8,402

 
8,402

Weighted average shares outstanding — diluted
101,059

 
98,316

 
96,278

Basic earnings per share
$
1.93

 
$
2.09

 
$
1.23

Diluted earnings per share
$
1.71

 
$
1.85

 
$
1.12