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OTHER REAL ESTATE OWNED AND REPOSSESSIONS - Schedule of Expenses Applicable to Foreclosed Assets (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Other Real Estate Owned and Repossessions |  |
Net gains on sales of other real estate owned and repossessions | $ (6) | $ (46)
Valuation write-downs | 15 | 82
Operating expenses, net of rental income | 154 | 232
Expenses on real estate and repossessions | $ 163 | $ 268

X
- Definition Represents the monetary amount of Net (gain) loss on sales of other real estate owned, during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | gsbc_
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X
- Definition Represents the monetary amount of Operating expenses, net of rental income, during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Valuation write-downs on foreclosed assets, during the indicated time period. + References No definition available. + Details
Name: | gsbc_ValuationWriteDownsOnForeclosedAssets
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Amount of expense recognized during the period for the foreclosure on real estate assets. + References No definition available. + Details
Name: | us-gaap_ForeclosedRealEstateExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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