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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Earnings Per Share [Abstract] | |||||||||||
| Earnings from continuing operations, net of income tax expense | $ 9,061 | $ 3,819 | $ (34,999) | $ 23,978 | $ 30,112 | $ 28,987 | $ 28,374 | $ 23,745 | $ 1,859 | $ 111,218 | $ 90,947 |
| Discontinued operations, net of tax | 0 | 0 | 3,889 | ||||||||
| Net earnings attributable to Centene Corporation | $ 1,859 | $ 111,218 | $ 94,836 | ||||||||
| Weighted average number of common shares outstanding (in shares) | 51,509,366 | 50,198,954 | 48,754,947 | ||||||||
| Common stock equivalents (as determined by applying the treasury stock method) | 2,205,009 | 2,275,284 | 1,692,941 | ||||||||
| Weighted average number of common shares and potential dilutive common shares outstanding (in shares) | 53,714,375 | 52,474,238 | 50,447,888 | ||||||||
| Continuing operations, Basic | $ 0.04 | $ 2.22 | $ 1.87 | ||||||||
| Discontinued operations, Basic | $ 0.00 | $ 0.00 | $ 0.08 | ||||||||
| Earnings per common share, Basic | $ 0.17 | $ 0.07 | $ (0.68) | $ 0.47 | $ 0.60 | $ 0.58 | $ 0.57 | $ 0.48 | $ 0.04 | $ 2.22 | $ 1.95 |
| Continuing operations, Diluted | $ 0.03 | $ 2.12 | $ 1.80 | ||||||||
| Discontinued operations, Diluted | $ 0.00 | $ 0.00 | $ 0.08 | ||||||||
| Earnings per common share, Diluted | $ 0.17 | $ 0.07 | $ (0.68) | $ 0.45 | $ 0.57 | $ 0.55 | $ 0.54 | $ 0.46 | $ 0.03 | $ 2.12 | $ 1.88 |
| Anti-dilutive stock options, restricted stock and restricted stock units excluded from the calculation of diluted earnings per common share | 142,425 | 106,219 | 2,010,183 | ||||||||
| X | ||||||||||
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) derived from discontinued operations during the period, net of related tax effect, per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income or loss derived from discontinued operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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