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Stockholders’ Equity and Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of earnings per share calculations | The following table presents the EPS calculations for the years ended December 31, 2017, 2016 and 2015. The Company applied the two-class method in the computation of basic and diluted EPS in the periods when the RSAs were outstanding. The RSAs were fully vested as of December 31, 2015. For additional information regarding the Company’s EPS calculation, see Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements. With the adoption of ASU 2016-09 during the first quarter of 2017, the impact of excess tax benefits and deficiencies is no longer included in the calculation of diluted EPS. As a result of applying ASU 2016-09 in 2017, the Company recorded income tax benefits of $4.8 million or $0.03 per common share for the year ended December 31, 2017 related to the vesting of the RSUs. See Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements for additional information.
($ and shares in thousands, except per share data) |  | Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Basic |  |  |  |  |  |
Net income |  | $ | 505,624 |  |  | $ | 431,677 |  |  | $ | 384,677 |
Less: earnings allocated to participating securities |  | — |  |  | — |  |  | (3 | )
Net income allocated to common stockholders |  | $ | 505,624 |  |  | $ | 431,677 |  |  | $ | 384,674 |
Basic weighted-average number of shares outstanding |  | 144,444 |  |  | 144,087 |  |  | 143,818 |
Basic EPS |  | $ | 3.50 |  |  | $ | 3.00 |  |  | $ | 2.67 |
Diluted |  |  |  |  |  |
Net income allocated to common stockholders |  | $ | 505,624 |  |  | $ | 431,677 |  |  | $ | 384,680 |
Basic weighted-average number of shares outstanding |  | 144,444 |  |  | 144,087 |  |  | 143,818 |
Diluted potential common shares (1) |  | 1,469 |  |  | 1,085 |  |  | 694 |
Diluted weighted-average number of shares outstanding |  | 145,913 |  |  | 145,172 |  |  | 144,512 |
Diluted EPS |  | $ | 3.47 |  |  | $ | 2.97 |  |  | $ | 2.66 |
(1) | Includes dilutive shares from RSUs and warrants for the years ended December 31, 2017, 2016 and 2015.

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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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