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Earnings per Common Share (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Schedule of earnings per share, basic and diluted A reconciliation of the numerators and denominators of the basic and diluted EPS calculations follows.
Three Months Ended
 March 31,
(In thousands, except per share data)20212020
Numerator:
Net income$641,207 $362,173 
Preferred stock dividends1,201 3,464 
Net income attributable to SLM Corporation common stock$640,006 $358,709 
Denominator:
Weighted average shares used to compute basic EPS361,042 409,786 
Effect of dilutive securities:
Dilutive effect of stock options, restricted stock, restricted stock units, performance stock units and Employee Stock Purchase Plan (“ESPP”) (1)(2)
5,198 2,969 
Weighted average shares used to compute diluted EPS366,240 412,755 
Basic earnings per common share attributable to SLM Corporation$1.77 $0.88 
Diluted earnings per common share attributable to SLM Corporation$1.75 $0.87 


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(1)     Includes the potential dilutive effect of additional common shares that are issuable upon exercise of outstanding stock options, restricted stock, restricted stock units, performance stock units and the outstanding commitment to issue shares under the ESPP, determined by the treasury stock method.
(2)      For the three months ended March 31, 2021 and 2020, securities covering approximately 1 million shares and 2 million shares, respectively, were outstanding but not included in the computation of diluted earnings per share because they were anti-dilutive.