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DERIVATIVES AND HEDGING ACTIVITIES - Agreements with Derivative Counterparties (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
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Balance Sheet Hedge |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Counterparties Collateral | $ 1,200,000 |
Loan Level Swap |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Counterparties Collateral | 490,000 | $ 5,300,000
Net Liability Position | Balance Sheet Hedge |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Termination Value of Derivatives With Derivative Dealer Counterparties | $ 689,000 | $ 391,000

X
- Definition Represents the monetary amount of Derivative Counterparties Collateral, as of the indicated date. + References No definition available. + Details
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Balance Type: | debit
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- Definition Represents the monetary amount of Termination Value of Derivatives With Derivative Dealer Counterparties, as of the indicated date. + References No definition available. + Details
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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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Balance Type: | na
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |