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:	num:areaItemType
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

Minimum Commitment for Cash Payment to Acquire Sheridan as Part of Total Consideration

No definition available.

Name:	amsg_MinimumCashPaymenttoAcquireBusiness
Namespace Prefix:	amsg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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