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Legal Proceedings (Details) | Sep. 30, 2021 state
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Commitments and Contingencies Disclosure [Abstract] |
Number of states seeking recovery of unclaimed property | 27
Number of states requesting payment | 19

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- Definition Number of States Requesting Payments + References No definition available. + Details
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Namespace Prefix: | gic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of states being audited and seeking recovery of unclaimed property. + References No definition available. + Details
Name: | gic_NumberOfStatesSeekingRecoveryOfUnclaimedProperty
Namespace Prefix: | gic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration