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Nature of Operations and Summary of Significant Accounting Policies - Options to Purchase Shares of Common Stock (Details) - shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Nature of Operations and Summary of Significant Accounting Policies |  |  |
Options to purchase shares of common stock outstanding not included in computation of diluted earnings per share because exercise price greater than average market price | 749,833 | 559,484 | 383,338

X
- Definition Represents the options to purchase shares of common stock outstanding not included in computation of diluted earnings per share because exercise price greater than average market price (number of shares), during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | gsbc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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