XML 87 R77.htm IDEA: XBRL DOCUMENT
v3.25.3

DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of financial instruments fair value (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
Subordinated debentures |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 25,774 | $ 25,774
Fair Value | $ 25,774 | $ 25,774
Hierarchy Level | 3 | 3
Subordinated notes |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount |  | $ 74,876
Fair Value |  | $ 74,438
Hierarchy Level | 2 | 2
Deposits |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 4,528,033 | $ 4,605,549
Fair Value | $ 4,525,509 | $ 4,602,312
Hierarchy Level | 3 | 3
Short-term borrowings |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 468,581 | $ 578,691
Fair Value | $ 468,581 | $ 578,691
Hierarchy Level | 3 | 3
Interest payable |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 3,909 | $ 12,761
Fair Value | $ 3,909 | $ 12,761
Hierarchy Level | 3 | 3
Unrecognized financial instruments (net of contractual value) | Commitments to originate loans |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Hierarchy Level | 3 | 3
Unrecognized financial instruments (net of contractual value) | Letters of credit |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 53 | $ 72
Fair Value | $ 53 | $ 72
Hierarchy Level | 3 | 3
Unrecognized financial instruments (net of contractual value) | Lines of credit |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Hierarchy Level | 3 | 3
Loans, net of allowance for credit losses |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 4,467,683 | $ 4,690,393
Fair Value | $ 4,348,382 | $ 4,529,729
Hierarchy Level | 3 | 3
Cash and cash equivalents |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 196,235 | $ 195,756
Fair Value | $ 196,235 | $ 195,756
Hierarchy Level | 1 | 1
Held-to-maturity securities |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 181,315 | $ 187,433
Fair Value | $ 163,589 | $ 162,765
Hierarchy Level | 2 | 2
Mortgage loans held for sale |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 5,593 | $ 6,937
Fair Value | $ 5,593 | $ 6,937
Hierarchy Level | 2 | 2
Interest receivable |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 19,931 | $ 20,430
Fair Value | $ 19,931 | $ 20,430
Hierarchy Level | 3 | 3
Investment in FHLBank stock and other assets |  |
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Carrying Amount | $ 25,603 | $ 28,392
Fair Value | $ 25,603 | $ 28,392
Hierarchy Level | 3 | 3

X
- Definition Represents the pure numeric value of Fair Value Hierarchy Level, as of the indicated date. + References No definition available. + Details
Name: | gsbc_FairValueHierarchyLevel
Namespace Prefix: | gsbc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the monetary amount of financial instruments owned carrying amount, as of the indicated date. + References No definition available. + Details
Name: | gsbc_FinancialInstrumentsOwnedCarryingAmount
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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 + Details
Name: | us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479035/940-320-45-2 + Details
Name: | us-gaap_FinancialInstrumentsOwnedAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_DepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ShortTermDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=gsbc_AccruedInterestPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=gsbc_UnrecognizedFinancialInstrumentsNetOfContractualValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gsbc_CommitmentsToOriginateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_HeldtomaturitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=gsbc_MortgageLoansHeldForSale1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=gsbc_InterestReceivable1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=gsbc_InvestmentInFhlBankStockAndOtherInterestEarningAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |