Amount for accrued, but unpaid interest on the converted notes for the period.

No definition available.

Name:	ebs_DebtInstrumentAccruedInterestOnConvertedNotes
Namespace Prefix:	ebs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of additional equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

+ References

No definition available.

+ Details

Name:	ebs_DebtInstrumentNumberOfAdditionalEquityInstruments
Namespace Prefix:	ebs_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Number Of Equity Instruments

+ References

No definition available.

+ Details

Name:	ebs_DebtInstrumentNumberOfEquityInstruments
Namespace Prefix:	ebs_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=ebs_ConvertibleSeniorNotesDue2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term debt - Convertible Senior Notes (Details) - 2.875% Convertible Senior Notes Due 2021 - USD ($)			1 Months Ended
	Nov. 14, 2017	Aug. 12, 2016	Dec. 28, 2017	Dec. 31, 2019	Jan. 29, 2014
Long-Term Debt [Line Items]
Interest rate, stated percentage	2.875%			2.875%	2.875%
Face amount	$ 250,000,000.0		$ 239,400,000	$ 10,600,000
Conversion rate of notes per $1,000 principal amount (in shares)		32.386	8,500,000
Debt issuance costs			$ 3,600,000
Additional conversion rate of notes per $1,000 principal amount (in shares)	3.1556
Accrued interest on converted notes	$ 2,400,000