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Basis of Presentation (Details) | 3 Months Ended
--- | ---
Mar. 29, 2013 | Mar. 30, 2012
Basis of Presentation [Abstract] |  |
Weeks In Reporting Period | 13 | 13

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- Definition Number of weeks in reporting period + References No definition available. + Details
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Namespace Prefix: | gb_
Data Type: | invest:dateStringItemType
Balance Type: | na
Period Type: | duration

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