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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Reconciliation of Earnings Per Share | The following is a reconciliation of our earnings per share (in thousands, except for per share data):
| Years Ended, December 31, |
| 2017 |  |  | 2016 |  |  | 2015 |
Net income for basic and diluted earnings per share | $ | 135,153 |  |  | $ | 74,805 |  |  | $ | 70,949 |
Weighted average shares outstanding - basic |  | 33,220 |  |  |  | 33,841 |  |  |  | 35,876 |
Dilutive effect of stock options and restricted stock |  | 130 |  |  |  | 108 |  |  |  | 92 |
Weighted average shares outstanding - diluted |  | 33,350 |  |  |  | 33,949 |  |  |  | 35,968 |
Earnings per share - basic | $ | 4.07 |  |  | $ | 2.21 |  |  | $ | 1.98 |
Earnings per share - diluted | $ | 4.05 |  |  | $ | 2.20 |  |  | $ | 1.97 |

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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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