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Earnings per Share ("EPS") (Tables) | 12 Months Ended
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Dec. 31, 2019
Schedule of calculation of the basic EPS and the diluted EPS | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net Income | ​ | Shares | ​ | Per Share |
​ | ​ | (Numerator) | ​ | (Denominator) | ​ | Amount |
​ | ​ | (Dollars in Thousands, |
​ | ​ | Except Per Share Amounts) |
December 31, 2019: |  | ​ |  |  |  |  | ​ |  | ​
Basic EPS | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income available to common shareholders | ​ | $ | 205,104 |  | 65,476,606 | ​ | $ | 3.13 | ​
Potential dilutive common shares and warrants | ​ |  | — |  | 209,078 | ​ | ​ | ​ | ​
Diluted EPS | ​ | $ | 205,104 |  | 65,685,684 | ​ | $ | 3.12 | ​
December 31, 2018: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic EPS | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income available to common shareholders | ​ | $ | 215,931 |  | 66,106,580 | ​ | $ | 3.27 | ​
Potential dilutive common shares and warrants | ​ |  | — |  | 527,240 | ​ | ​ | ​ | ​
Diluted EPS | ​ | $ | 215,931 |  | 66,633,820 | ​ | $ | 3.24 | ​
December 31, 2017: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic EPS | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income available to common shareholders | ​ | $ | 157,436 |  | 66,046,155 | ​ | $ | 2.38 | ​
Potential dilutive common shares | ​ |  | — |  | 732,281 | ​ | ​ | ​ | ​
Diluted EPS | ​ | $ | 157,436 |  | 66,778,436 | ​ | $ | 2.36 | ​

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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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