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Earnings Per Share Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | A reconciliation of the numerators and denominators of basic and diluted EPS for the three years ended December 31 is presented below:
| 2016 |  | 2015 |  | 2014
| (In thousands, except per share amounts)
Amounts attributable to common stockholders: |  |  |  |  |  |  |  |
Income from continuing operations — basic | $ | 177,038 |  |  | $ | 234,162 |  |  | $ | 170,283 |
After tax interest on convertible debt | 43 |  |  | 50 |  |  | 51 |
Income from continuing operations — diluted | $ | 177,081 |  |  | $ | 234,212 |  |  | $ | 170,334 |
(Loss) income from discontinued operations, net of tax | $ | — |  |  | $ | (390 | ) |  | $ | 2,186 |
Net income — basic | $ | 177,038 |  |  | $ | 233,772 |  |  | $ | 172,469 |
After tax interest on convertible debt | 43 |  |  | 50 |  |  | 51 |
Net income — diluted | $ | 177,081 |  |  | $ | 233,822 |  |  | $ | 172,520 |
Weighted average shares: |  |  |  |  |  |  |  |
Weighted average shares — basic | 193,086 |  |  | 200,356 |  |  | 210,741 |
Stock options | 2,823 |  |  | 3,973 |  |  | 3,338 |
Restricted share units | 12 |  |  | — |  |  | — |
Convertible debt | 121 |  |  | 121 |  |  | 121 |
Weighted average shares — diluted | 196,042 |  |  | 204,450 |  |  | 214,200 |
Amounts attributable to common stockholders: |  |  |  |  |
Income from continuing operations per share: |  |  |  |  |
Basic | $ | 0.92 |  |  | $ | 1.17 |  |  | $ | 0.81 |
Diluted | $ | 0.90 |  |  | $ | 1.14 |  |  | $ | 0.80 |
Income from discontinued operations per share: |  |  |  |  |
Basic | $ | — |  |  | $ | — |  |  | $ | 0.01 |
Diluted | $ | — |  |  | $ | — |  |  | $ | 0.01 |
Net income per share: |  |  |  |  |  |  |  |
Basic | $ | 0.92 |  |  | $ | 1.17 |  |  | $ | 0.82 |
Diluted | $ | 0.90 |  |  | $ | 1.14 |  |  | $ | 0.81 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
| 2016 |  | 2015 |  | 2014
| (In thousands)
Antidilutive options | 982 |  |  | 3 |  |  | 1,491 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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