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Derivatives and Hedging Activities - Cash Flow Hedges (Details) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 28, 2023	Jul. 31, 2022	Mar. 31, 2022	Oct. 31, 2018
Derivatives and Hedging Activities
USD-Prime rate		7.50%
USD-SOFR OIS rate		4.52766%
Non-interest income related to changes in the fair value		$ 0	$ 0
Interest rate swaps | Cash flow hedges
Derivatives and Hedging Activities
Total notional amount of the swaps							$ 300,000,000	$ 400,000,000
Derivative, fixed interest rate							1.6725%	3.018%
Terminated notional amount of derivatives	$ 400,000,000
Expected interest income on termination	$ 45,900,000
Loan interest income on terminated interest rate swap		8,100,000	8,100,000	$ 8,100,000
Terminated interest rate swap		1,900,000	10,400,000
Interest rate swaps | Fair Value Hedges
Derivatives and Hedging Activities
Total notional amount of the swaps					$ 95,000,000
Derivative, fixed interest rate					4.65%
Interest rate swap one | Cash flow hedges
Derivatives and Hedging Activities
Total notional amount of the swaps						$ 200,000,000
Derivative, fixed interest rate						2.628%
Interest rate swap two | Cash flow hedges
Derivatives and Hedging Activities
Total notional amount of the swaps						$ 200,000,000
Derivative, fixed interest rate						5.725%
July 2022 interest rate swaps | Cash flow hedges
Derivatives and Hedging Activities
Loan interest income expense		$ 10,400,000	$ 7,200,000

X

- Definition

Represents the amount of interest income (expense) on interest rate swap.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of interest income on terminated interest rate swap.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount of terminated value of derivatives.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of interest income expected upon termination of a derivative contract.

+ References

No definition available.

+ Details

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- Definition

Amount of derivative termination value loan interest income.

+ References

No definition available.

+ Details

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X

- Definition

It represents the amount of non interest income changes in fair value.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of USD-prime rate.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of USD-SOFR OIS rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- 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.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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- Details

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- Details

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- Details

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