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Condensed Parent Company Statements - Statements of Comprehensive Income - (Details) - Parent Company - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Statements of Comprehensive Income |  |  |
Net Income | $ 75,948 | $ 74,627 | $ 59,313
Comprehensive income (loss) of subsidiaries | (86,114) | (20,392) | 20,905
Comprehensive Income | $ (10,166) | $ 54,235 | $ 80,218

X
- Definition Represents the monetary amount of Comprehensive Income of subsidiaries, during the indicated time period. + References No definition available. + Details
Name: | gsbc_ComprehensiveIncomeOfSubsidiaries
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Comprehensive Income parent, during the indicated time period. + References No definition available. + Details
Name: | gsbc_ComprehensiveIncomeParent
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Net Comprehensive Income Parent Company, during the indicated time period. + References No definition available. + Details
Name: | gsbc_NetComprehensiveIncomeParentCompany
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
Name: | srt_CondensedStatementOfIncomeCaptionsLineItems
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |