Name:	amsg_ContractualObligationAnnualRentalPayment
Namespace Prefix:	amsg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The fixed percentage amount of the annual rent increase stated in the executed lease for the Company's future corporate headquarters expected to commence in 2015.

No definition available.

Name:	amsg_ContractualObligationAnnualRentalPaymentIncrease
Namespace Prefix:	amsg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The estimated rental square footage stated in the executed lease for the Company's future corporate headquarters expected to commence in 2015.

No definition available.

Name:	amsg_ContractualObligationLeaseSquareFootage
Namespace Prefix:	amsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The maximum allowable amount of tenant improvement allowances stated in the executed lease for the Company's future corporate headquarters expected to commence in 2015.

No definition available.

Name:	amsg_ContractualObligationMaximumTenantAllowance
Namespace Prefix:	amsg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The number of years in the initial term of the executed lease for the Company's future corporate headquarters expected to commence in 2015.

No definition available.

Name:	amsg_ContractualObligationTerm
Namespace Prefix:	amsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of business units of acquiree in single transaction

No definition available.

Name:	amsg_NumberOfBusinessUnitsOfAcquireeInSingleTransaction
Namespace Prefix:	amsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

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

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph g

-Clause 3

-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.

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents commitments outstanding as of the balance sheet date which obligate or represent potential claims against the assets of the Company relating to, for example, the extension of credit. Further, commitments generally represent off balance sheet arrangements that obligate the entity to deliver assets or services or enter into another obligation in the future.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

-Article 9

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 210.5-02.25)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 25

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 7