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Earnings Per Share (Tables) | 6 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Calculation of Basic and Diluted Earnings per Share | The chart below shows the calculation of basic and diluted earnings per share (in thousands, except per share amounts):
|  | Three Months Ended |  |  | Six Months Ended |
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net income |  | $ | 68,596 |  |  | $ | 142,795 |  |  | $ | 147,429 |  |  | $ | 184,841 |
Weighted-average number of basic shares outstanding during the period |  |  | 24,856 |  |  |  | 24,622 |  |  |  | 24,796 |  |  |  | 24,555 |
Dilutive effect of RSUs after application of treasury stock method |  |  | 482 |  |  |  | 589 |  |  |  | 585 |  |  |  | 673 |
Weighted-average number of diluted shares outstanding during the period |  |  | 25,338 |  |  |  | 25,211 |  |  |  | 25,381 |  |  |  | 25,228 |
Basic earnings per share |  | $ | 2.76 |  |  | $ | 5.80 |  |  | $ | 5.95 |  |  | $ | 7.53 |
Diluted earnings per share |  | $ | 2.71 |  |  | $ | 5.66 |  |  | $ | 5.81 |  |  | $ | 7.33 |

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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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