Percentage of revenue generated from a single external customer.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

The point of time at which final settlement of the experience rebate payable is submitted to the contractor of a managed care contract after the contract period ends.

+ References

No definition available.

+ Details

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use or to be disposed of.

+ References

No definition available.

+ Details

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Namespace Prefix:	agp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The highest rate at which a premium tax is levied by a state government on the net premium income collected as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The lowest rate at which a premium tax is levied by a state government on the net premium income collected as of the reporting date.

+ References

No definition available.

+ Details

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Namespace Prefix:	agp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The range of notification periods that must be provided to terminate a contract, as stipulated within an individual contract.

+ References

No definition available.

+ Details

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Namespace Prefix:	agp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:	agp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The general length of a managed care contract.

+ References

No definition available.

+ Details

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Namespace Prefix:	agp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash equivalents may be reported as cash equivalents, while legally restricted equivalents held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular equivalents are not generally reported as part of unrestricted cash equivalents.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Summary of Significant Accounting Policies and Practices (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Interest rate of convertible senior notes	2.00%	2.00%	2.00%
Range of notification period for managed care contracts containing a termination clause	30 to 180 days
Summary of Significant Accounting Policies and Practices (Textual) [Abstract]
Cash equivalents	$ 539,512	$ 741,835
Impairment of long-lived assets	0	0	0
Point of time at which final settlement of the experience rebate payable with the state of Texas is submitted after the contract period ends	334 days
Premium tax rate minimum	1.75%
Premium tax rate maximum	7.50%
General length of a managed care contract	one- to two-years
Advertising and related marketing expense	$ 15,092	$ 5,084	$ 6,245
Georgia [Member]
Revenue, Major Customer [Line Items]
Percentage of premium revenues generated through contract(s) with the state	12.00%
Tennessee [Member]
Revenue, Major Customer [Line Items]
Percentage of premium revenues generated through contract(s) with the state	14.00%
Texas [Member]
Revenue, Major Customer [Line Items]
Percentage of premium revenues generated through contract(s) with the state	22.00%
Maryland [Member]
Revenue, Major Customer [Line Items]
Percentage of premium revenues generated through contract(s) with the state	11.00%
7.5% Senior Notes due November 15, 2019 [Member]
Property, Plant and Equipment [Line Items]
Interest rate of convertible senior notes	7.50%
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, minimum depreciable life	3
Property and equipment, maximum depreciable life	15
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, average depreciable life	7
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, minimum depreciable life	3
Property and equipment, maximum depreciable life	5
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, minimum depreciable life	3
Property and equipment, maximum depreciable life	10