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Stockholders' Equity and Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Stockholders' Equity and Earnings Per Share [Abstract] |
Schedule of earnings per share calculations | The following table presents the EPS calculations for the three and nine months ended September 30, 2019 and 2018:
($ and shares in thousands, except per share data) |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Basic: |  |  |  |  |  |  |  |
Net income |  | $ | 171,416 |  |  | $ | 171,302 |  |  | $ | 485,820 |  |  | $ | 530,683 |
Basic weighted-average number of shares outstanding |  | 145,559 |  |  | 144,921 |  |  | 145,455 |  |  | 144,829 |
Basic EPS |  | $ | 1.18 |  |  | $ | 1.18 |  |  | $ | 3.34 |  |  | $ | 3.66 |
Diluted: |  |  |  |  |  |  |  |
Net income |  | $ | 171,416 |  |  | $ | 171,302 |  |  | $ | 485,820 |  |  | $ | 530,683 |
Basic weighted-average number of shares outstanding |  | 145,559 |  |  | 144,921 |  |  | 145,455 |  |  | 144,829 |
Diluted potential common shares (1) |  | 561 |  |  | 1,252 |  |  | 633 |  |  | 1,329 |
Diluted weighted-average number of shares outstanding (1) |  | 146,120 |  |  | 146,173 |  |  | 146,088 |  |  | 146,158 |
Diluted EPS |  | $ | 1.17 |  |  | $ | 1.17 |  |  | $ | 3.33 |  |  | $ | 3.63 |
(1) Includes dilutive shares from RSUs for the three and nine months ended September 30, 2019, and from RSUs and warrants for the three and nine months ended September 30, 2018.

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- Definition Stockholders' Equity and Earnings Per Share [Abstract] + References No definition available. + Details
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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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