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Fair Value Measurement (Contingent Consideration Roll Forward) (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 29, 2013
Contingent Consideration Liability [Roll Forward] |
Accrued Contingent Consideration, Beginning Balance | $ 1,530
Contingent Consideration Recognized In Period | 0
Change in Amount of Contingent Consideration Liability | 70
Contingent Payment Related To Business Combination | 0
Accrued Contingent Consideration, Ending Balance | $ 1,600

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- Definition Estimated discounted potential payments under contingent consideration arrangements. + References No definition available. + Details
Name: | gb_AccruedContingentConsideration
Namespace Prefix: | gb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Contingent consideration recognized in the period + References No definition available. + Details
Name: | gb_ContingentConsiderationRecognizedInPeriod
Namespace Prefix: | gb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contingent payment related to business combination + References No definition available. + Details
Name: | gb_ContingentPaymentRelatedToBusinessCombination
Namespace Prefix: | gb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph b -Clause 1 -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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration