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Noncontolling Interest and Acquisitions Acquisitions (Details) (USD $)
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12 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | |||||||||||
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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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Jun. 30, 2010
Carolina Crescent Health Plan [Member]
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Jul. 31, 2010
Novasys Health, LLC. [Member]
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Jun. 30, 2011
Citrus Health Care, Inc. [Member]
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Dec. 31, 2010
Citrus Health Care, Inc. [Member]
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Dec. 31, 2012
Louisiana Healthcare Connections [Member]
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Oct. 31, 2012
Louisiana Healthcare Connections [Member]
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Dec. 31, 2010
Access Health Solutions, LLC. [Member]
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Dec. 31, 2011
Access Health Solutions, LLC. [Member]
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Dec. 31, 2010
Centene Center LLC [Member]
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Dec. 31, 2012
Casenet, LLC [Member]
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Dec. 31, 2011
Casenet, LLC [Member]
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Jun. 30, 2011
Casenet, LLC [Member]
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Dec. 31, 2010
Casenet, LLC [Member]
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| Business Acquisition [Line Items] | ||||||||||||||||
| Total consideration | $ 17,993,000 | $ 6,619,000 | ||||||||||||||
| Goodwill | 16,543,000 | 1,444,000 | 19,069,000 | 22,951,000 | 1,773,000 | 8,975,000 | 1,752,000 | |||||||||
| Intangible assets | 1,450,000 | 3,050,000 | 9,620,000 | 5,738,000 | 3,561,000 | 4,500,000 | ||||||||||
| Business acquisition, cash paid | 4,330,000 | 28,689,000 | ||||||||||||||
| Acquisition of additional ownership | 14,429,000 | 0 | 48,257,000 | 10,000,000 | 0 | 48,250,000 | 4,429,000 | |||||||||
| Net deferred tax assests | 86,756,000 | 68,419,000 | 12,779,000 | |||||||||||||
| Ownership percentage by parent | 51.00% | 81.00% | 68.00% | |||||||||||||
| Allocation of fair value of unearned revenue | $ 6,284,000 | |||||||||||||||
| X | ||||||||||
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- Definition
Amount of cash paid to acquire the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of acquisition cost of a business combination allocated to deferred revenue of the acquired entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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| X | ||||||||||
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- Definition
The cash outflow associated with the purchase of noncontrolling interest during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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