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Fair Value Measurement (Contingent Consideration Assumotions) (Details 2) (USD $) In Thousands, unless otherwise specified | Mar. 29, 2013
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Financial Milestones [Member] |
Fair Value Assumptions [Line Items] |
Contingent Consideration Fair Value | $ 900
Risk Adjusted Discount Rate For Contingent Consideration | 12.00%
Contingent Consideration Liability Projected Year Of Payment | 2014
Development Milestones [Member] |
Fair Value Assumptions [Line Items] |
Contingent Consideration Fair Value | $ 700
Risk Adjusted Discount Rate For Contingent Consideration | 20.00%
Contingent Consideration Liability Projected Year Of Payment | 2015

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- Definition Fair value, as of the balance sheet date, of potential payments under the contingent consideration arrangement + References No definition available. + Details
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Namespace Prefix: | gb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition contingent consideration liability, projected year of payment + References No definition available. + Details
Name: | gb_ContingentConsiderationLiabilityProjectedYearOfPayment
Namespace Prefix: | gb_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | gb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Risk-adjusted discount rate for contingent consideration + References No definition available. + Details
Name: | gb_RiskAdjustedDiscountRateForContingentConsideration
Namespace Prefix: | gb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant