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Derivatives and Hedging Activities - Cash Flow Hedge on Statements of Income (Details) - Interest Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives and Hedging Activities
Interest rate swaps, net of income taxes	$ (4,136)	$ (9,496)	$ 7,182
Terminated interest rate swaps, net of income taxes
Derivatives and Hedging Activities
Interest rate swaps, net of income taxes	8,145	8,122	8,123
Active interest rate swaps, net of income taxes
Derivatives and Hedging Activities
Interest rate swaps, net of income taxes	$ (12,281)	$ (17,618)	$ (941)

X

- Definition

Represents the monetary amount of effect of cash flow hedge accounting on the statements of operations, during the indicated time period.

+ References

No definition available.

+ Details

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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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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