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Short-Term Borrowings - Short-term borrowings (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Short-Term Borrowings. |  |
Weighted average interest rates of short-term borrowings | 4.76% | 2.16%
Short-term borrowings average | $ 225.1 | $ 181.1
Maximum amounts outstanding of short-term borrowing | $ 410.6 | $ 317.7

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- Definition Represents the monetary amount of Short term borrowing maximum amounts outstanding at any month end, as of the indicated date. + References No definition available. + Details
Name: | gsbc_ShortTermBorrowingMaximumAmountsOutstandingAtAnyMonthEnd
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents the monetary amount of Short-term borrowings average, as of the indicated date. + References No definition available. + Details
Name: | gsbc_ShortTermBorrowingsAverage
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Weighted average interest rate of short-term debt outstanding calculated at point in time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant