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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Computation of basic and diluted EPS | The following table shows the computation of basic and diluted EPS for the years ended December 31, 2018, 2017, and 2016:
| Net Income (Numerator) |  | Weighted Average Shares (Denominator) |  | Earnings Per Share
| (Dollars in thousands, except share and per share data)
2018 |  |  |  |  |
Basic EPS - common stock | $ | 189,589 |  |  | 131,716,726 |  |  | $ | 1.44 |
Effect of dilutive securities: |  |  |  |  |
Stock options, restricted stock, performance awards, and ESPP shares |  |  | 237,466 |  |  |
Diluted EPS - common stock | $ | 189,589 |  |  | 131,954,192 |  |  | $ | 1.44 |
2017 |  |  |  |  |
Basic EPS - common stock | $ | 139,445 |  |  | 135,348,938 |  |  | $ | 1.03 |
Effect of dilutive securities: |  |  |  |  |
Stock options, restricted stock, and performance awards |  |  | 336,031 |  |  |
Diluted EPS - common stock | $ | 139,445 |  |  | 135,684,969 |  |  | $ | 1.03 |
2016 |  |  |  |  |
Basic EPS - common stock | $ | 113,747 |  |  | 103,289,059 |  |  | $ | 1.10 |
Effect of dilutive securities: |  |  |  |  |
Stock options, restricted stock, and performance awards |  |  | 241,259 |  |  |
Diluted EPS - common stock | $ | 113,747 |  |  | 103,530,318 |  |  | $ | 1.10 |

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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://www.xbrl.org/2003/role/presentationRef -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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