Earnings Per Share
 12 Months Ended
Nov. 30, 2021
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
Basic and diluted earnings per share were calculated as follows (in thousands, except per share amounts):
 Years Ended November 30,
 202120202019
Numerator:
Net income
$564,746 $296,243 $268,775 
Less: Distributed earnings allocated to nonvested restricted stock
(253)(197)(123)
Less: Undistributed earnings allocated to nonvested restricted stock
(2,366)(1,329)(1,505)
Numerator for basic earnings per share
562,127 294,717 267,147 
Effect of dilutive securities:
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes
— — 541 
Add: Undistributed earnings allocated to nonvested restricted stock
2,366 1,329 1,505 
Less: Undistributed earnings reallocated to nonvested restricted stock
(2,286)(1,278)(1,412)
Numerator for diluted earnings per share
$562,207 $294,768 $267,781 
Denominator:
Weighted average shares outstanding — basic
90,401 90,464 87,996 
Effect of dilutive securities:
Share-based payments
3,186 3,622 4,415 
Convertible senior notes
— — 1,427 
Weighted average shares outstanding — diluted
93,587 94,086 93,838 
Basic earnings per share$6.22 $3.26 $3.04 
Diluted earnings per share$6.01 $3.13 $2.85 
In 2021 and 2020, no outstanding stock options were excluded from the diluted earnings per share calculation. In 2019, outstanding stock options to purchase a nominal amount of common stock were excluded from the diluted earnings per share calculation because the effect of their inclusion would be antidilutive. The diluted earnings per share calculation for the year ended November 30, 2019 included the dilutive effect of our 1.375% convertible senior notes due 2019 based on the number of days they were outstanding during the period. We repaid those notes at their February 1, 2019 maturity.
Contingently issuable shares associated with outstanding PSUs were not included in the basic earnings per share calculations for the periods presented, as the applicable vesting conditions had not been satisfied.