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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share for the years ended December 31, 2016, 2015, and 2014 (in thousands, except per share data):
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Income from continuing operations |  | $ | 81,520 |  |  | $ | 92,336 |  |  | $ | 179,130 |
Loss from discontinued operations, net of tax |  |  | — |  |  |  | — |  |  |  | (3,063 | )
Net income |  |  | 81,520 |  |  |  | 92,336 |  |  |  | 176,067 |
Preferred dividends |  |  | 3,906 |  |  |  | — |  |  |  | — |
Net income available to common shareholders |  | $ | 77,614 |  |  | $ | 92,336 |  |  | $ | 176,067 |
Shares for basic and diluted calculation: |  |  |  |  |  |  |  |  |  |  |  |
Average shares used in basic computation |  |  | 66,871 |  |  |  | 68,543 |  |  |  | 66,472 |
Dilutive effect of stock options and units (1) |  |  | 10,692 |  |  |  | 10,011 |  |  |  | 9,904 |
Average shares used in diluted computation |  |  | 77,563 |  |  |  | 78,554 |  |  |  | 76,376 |
Earnings per basic common share: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.16 |  |  | $ | 1.35 |  |  | $ | 2.69 |
Loss from discontinued operations |  |  | — |  |  |  | — |  |  |  | (0.04 | )
Earnings per basic common share |  | $ | 1.16 |  |  | $ | 1.35 |  |  | $ | 2.65 |
Earnings per diluted common share: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.00 |  |  | $ | 1.18 |  |  | $ | 2.35 |
Loss from discontinued operations |  |  | — |  |  |  | — |  |  |  | (0.04 | )
Earnings per basic common share |  | $ | 1.00 |  |  | $ | 1.18 |  |  | $ | 2.31 |

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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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