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Earnings Per Common Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Common Share |
Earnings Per Common Share | ​ Note 13—Earnings Per Common Share ​ The following table sets forth the computation of basic and diluted earnings per common share: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended December 31,
(Dollars and shares in thousands, except for per share amounts) |  | ​ | 2019 | ​ | 2018 | ​ | 2017
Basic earnings per common share: | ​ |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | ​ | $ | 186,483 | ​ | $ | 178,871 | ​ | $ | 87,554
Weighted-average basic common shares | ​ | ​ | ​ | 34,561 | ​ | ​ | 36,530 | ​ | ​ | 29,686
Basic earnings per common share | ​ | ​ | $ | 5.40 | ​ | $ | 4.90 | ​ | $ | 2.95
Diluted earnings per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | ​ | $ | 186,483 | ​ | $ | 178,871 | ​ | $ | 87,554
Weighted-average basic common shares | ​ | ​ | ​ | 34,561 | ​ | ​ | 36,530 | ​ | ​ | 29,686
Effect of dilutive securities | ​ | ​ | ​ | 236 | ​ | ​ | 246 | ​ | ​ | 236
Weighted-average dilutive shares | ​ | ​ | ​ | 34,797 | ​ | ​ | 36,776 | ​ | ​ | 29,922
Diluted earnings per common share | ​ | ​ | $ | 5.36 | ​ | $ | 4.86 | ​ | $ | 2.93
​ The calculation of diluted earnings per common share excludes outstanding stock options for which the results would have been antidilutive under the treasury stock method as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended December 31, |
(Dollars in thousands) |  | ​ | 2019 | ​ | 2018 | ​ | 2017 |
Number of shares | ​ |  | ​ | ​ | ​ | ​ | 62,235 |  | ​ | ​ |  | ​ | 62,235 |  | ​ | ​ | ​ | ​ | 34,712 |
Range of exercise prices | ​ | ​ | $ | 87.30 | to | $ | 91.35 | ​ | $ | 87.30 | to | $ | 91.35 | ​ | $ | 69.48 | to | $ | 91.35 | ​
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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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