Leases (Future Min Schedule - Additional) (Details)	12 Months Ended
Dec. 31, 2015
Minimum [Member]
Capital Lease Interest Rate Range [Line Items]
Capital lease interest rates	1.70%
Maximum [Member]
Capital Lease Interest Rate Range [Line Items]
Capital lease interest rates	13.40%

Line items represent the range of interest rates applicable to capital lease obligations during the year.

No definition available.

Name:	amsg_CapitalLeaseInterestRateRangeLineItems
Namespace Prefix:	amsg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration