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DERIVATIVES AND HEDGING ACTIVITIES - Agreements with Derivative Counterparties (Details) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021
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Loan Level Swap |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative counterparties collateral | $ 20,800,000 | $ 1,200,000
Net Liability Position | Balance Sheet Hedge |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Termination value of derivatives with derivative dealer counterparties | $ (21,700,000) | (437,000)
Cash collateral received from derivative counterparty |  | $ 390,000

X
- Definition Amount of received cash collateral from another derivative counterparty. + References No definition available. + Details
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Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the monetary amount of derivative counterparties collateral, as of the indicated date. + References No definition available. + Details
Name: | gsbc_DerivativeCounterpartiesCollateral
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the monetary amount of termination value of derivatives with derivative dealer counterparties, as of the indicated date. + References No definition available. + Details
Name: | gsbc_TerminationValueOfDerivativesWithDerivativeDealerCounterparties
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |