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Net Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
Net Earnings Per Share |
Schedule of reconciliation of basic and diluted net income per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended |  | Year Ended |  | Year Ended
​ | ​ | December 31, 2019 | ​ | December 31, 2018 | ​ | December 31, 2017
​ | ​ | (in thousands, except share and per share amounts)
Basic earnings per share: | ​ | ​
Numerator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 587,121 | ​ | $ | 510,835 | ​ | $ | 756,152
Preferred stock dividends | ​ | ​ | (11,958) | ​ | ​ | — | ​ | ​ | —
Net income available to common stockholders | ​ | ​ | 575,163 | ​ | ​ | 510,835 | ​ | ​ | 756,152
Denominator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding | ​ |  | 111,895,433 | ​ |  | 104,716,301 | ​ |  | 103,189,175
Basic earnings per share | ​ | $ | 5.14 | ​ | $ | 4.88 | ​ | $ | 7.33
Diluted earnings per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Numerator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 587,121 | ​ | $ | 510,835 | ​ | $ | 756,152
Preferred stock dividends | ​ | ​ | (11,958) | ​ | ​ | — | ​ | ​ | —
Assumed conversion of convertible senior notes | ​ |  | — | ​ |  | 6,219 | ​ |  | 5,842
Net income available to common stockholders plus assumed conversions | ​ | $ | 575,163 | ​ | $ | 517,054 | ​ | $ | 761,994
Denominator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Number of shares used in basic computation | ​ |  | 111,895,433 | ​ |  | 104,716,301 | ​ |  | 103,189,175
Weighted-average effect of dilutive securities | ​ |  | 1,190,890 | ​ |  | 7,647,030 | ​ |  | 8,468,389
Number of shares used in per share computation | ​ |  | 113,086,323 | ​ |  | 112,363,331 | ​ |  | 111,657,564
Diluted earnings per share | ​ | $ | 5.09 | ​ | $ | 4.60 | ​ | $ | 6.82

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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