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Earnings per share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings per share |
Schedule of basic and diluted net income per share | The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):
|  | Three Months Ended |  | Nine Months Ended |  |
|  | September 30, |  | September 30, |  |
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |  |
Net income |  | $ | 34,937 |  | $ | 20,616 |  | $ | 124,232 |  | $ | 67,506 |  |
Less net income allocated to non-controlling interests |  |  | (17) |  |  | — |  |  | (17) |  |  | — |  |
Less net income allocated to participating securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-forfeitable dividends on participating securities |  |  | (89) |  |  | (80) |  |  | (268) |  |  | (269) |  |
Income allocated to participating securities |  |  | (49) |  |  | — |  |  | (236) |  |  | (12) |  |
Total net income allocated to participating securities |  |  | (138) |  |  | (80) |  |  | (504) |  |  | (281) |  |
Net income available to common stockholders |  |  | 34,782 |  |  | 20,536 |  |  | 123,711 |  |  | 67,225 |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Participating securities |  |  | 138 |  |  | 80 |  |  | 504 |  |  | 281 |  |
Net income for diluted net income per share |  | $ | 34,920 |  | $ | 20,616 |  | $ | 124,215 |  | $ | 67,506 |  |
Shares for basic net income per share |  |  | 39,487 |  |  | 39,428 |  |  | 39,470 |  |  | 39,403 |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 4 |  |  | 9 |  |  | 3 |  |  | 11 |  |
Performance-based stock units |  |  | 217 |  |  | 170 |  |  | 217 |  |  | 170 |  |
Participating securities |  |  | 157 |  |  | 141 |  |  | 155 |  |  | 154 |  |
Total effect of dilutive securities |  |  | 378 |  |  | 320 |  |  | 375 |  |  | 335 |  |
Shares for diluted net income per share |  |  | 39,865 |  |  | 39,748 |  |  | 39,845 |  |  | 39,738 |  |
Basic net income per share |  | $ | 0.88 |  | $ | 0.52 |  | $ | 3.13 |  | $ | 1.71 |  |
Diluted net income per share |  | $ | 0.88 |  | $ | 0.52 |  | $ | 3.12 |  | $ | 1.70 |  |

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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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