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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Reconciliation of Number of Shares Used in Calculating Basic and Diluted Earnings per Share | The following table reconciles the number of shares used in calculating basic and diluted earnings per share:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in thousands, except per share amounts) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Net income |  | $ | 17,137 |  |  | $ | 46,148 |  |  | $ | 23,697 |  |  | $ | 60,745 |
Basic weighted-average shares outstanding |  |  | 67,664 |  |  |  | 62,980 |  |  |  | 67,774 |  |  |  | 56,739 |
Incremental shares due to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance shares |  |  | 26 |  |  |  | 303 |  |  |  | 21 |  |  |  | 299 |
Restricted stock units |  |  | 23 |  |  |  | 33 |  |  |  | 71 |  |  |  | 90 |
Diluted weighted-average shares outstanding |  |  | 67,713 |  |  |  | 63,316 |  |  |  | 67,866 |  |  |  | 57,128 |
Basic net income per share |  | $ | 0.25 |  |  | $ | 0.73 |  |  | $ | 0.35 |  |  | $ | 1.07 |
Diluted net income per share |  | $ | 0.25 |  |  | $ | 0.73 |  |  | $ | 0.35 |  |  | $ | 1.06 |

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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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