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Net Income Per Common Share | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Net Income Per Common Share |
(9) | NET INCOME PER COMMON SHARE
Basic and diluted net income per common share based on weighted-average shares outstanding are calculated as follows:
|  | Income (Numerator) |  |  | Shares (Denominator) |  |  | Per Share Amount |
|  | (Dollars in thousands, except per share data) |
Three Months Ended September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 33,368 |  |  |  | 32,641,902 |  |  | $ | 1.02 |
Dilutive effect of stock options |  |  | — |  |  |  | 685,311 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 33,368 |  |  |  | 33,327,213 |  |  | $ | 1.00 |
Three Months Ended September 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 32,883 |  |  |  | 32,742,480 |  |  | $ | 1.01 |
Dilutive effect of stock options |  |  | — |  |  |  | 761,663 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 32,883 |  |  |  | 33,504,143 |  |  | $ | 0.98 |
Nine Months Ended September 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 99,372 |  |  |  | 32,627,924 |  |  | $ | 3.04 |
Dilutive effect of stock options |  |  | — |  |  |  | 686,374 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 99,372 |  |  |  | 33,314,298 |  |  | $ | 2.98 |
Nine Months Ended September 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 93,089 |  |  |  | 32,678,310 |  |  | $ | 2.85 |
Dilutive effect of stock options |  |  | — |  |  |  | 752,451 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 93,089 |  |  |  | 33,430,761 |  |  | $ | 2.78 |
The following table shows the number of options that were excluded from the computation of diluted net income per common share for each period because the options were anti-dilutive for the period:
|  | Shares |
Three Months Ended September 30, 2019 |  |  | 164,696 |
Three Months Ended September 30, 2018 |  |  | 83,799 |
Nine Months Ended September 30, 2019 |  |  | 174,489 |
Nine Months Ended September 30, 2018 |  |  | 84,368 |

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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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