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Earnings Per Common Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Common Share | Earnings per Common Share Basic earnings per common share (“EPS”) are calculated using the weighted average number of shares of common stock outstanding during each period. A reconciliation of the numerators and denominators of the basic and diluted EPS calculations follows.
|  | Years Ended December 31,
(In thousands, except per share data) |  | 2019 |  | 2018 |  | 2017
Numerator: |  |  |  |  |  |
Net income |  | $ | 578,276 |  |  | $ | 487,476 |  |  | $ | 288,934 |
Preferred stock dividends |  | 16,837 |  |  | 15,640 |  |  | 15,714 |
Net income attributable to SLM Corporation common stock |  | $ | 561,439 |  |  | $ | 471,836 |  |  | $ | 273,220 |
Denominator: |  |  |  |  |  |
Weighted average shares used to compute basic EPS |  | 427,292 |  |  | 435,054 |  |  | 431,216 |
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) |  | 3,382 |  |  | 4,627 |  |  | 7,335 |
Weighted average shares used to compute diluted EPS |  | 430,674 |  |  | 439,681 |  |  | 438,551 |
Basic earnings per common share attributable to SLM Corporation |  | $ | 1.31 |  |  | $ | 1.08 |  |  | $ | 0.63 |
Diluted earnings per common share attributable to SLM Corporation |  | $ | 1.30 |  |  | $ | 1.07 |  |  | $ | 0.62 |
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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 years ended December 31, 2019, 2018 and 2017, securities covering no shares, less than 1 million shares and no shares, respectively, were outstanding but not included in the computation of diluted earnings per share because they were anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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