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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

X

- 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

X

- Details

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