XML 76 R62.htm IDEA: XBRL DOCUMENT v3.20.4

Nature of Operations and Summary of Significant Accounting Policies - Restrictions on Cash and Due From Banks (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Nature of Operations and Summary of Significant Accounting Policies
Federal Reserve Bank Reserve Fund	$ 0	$ 69,400,000

X

- Definition

Represents the monetary amount of Federal Reserve Bank Reserve Fund, as of the indicated date.

+ References

No definition available.

+ Details

Name:	gsbc_FederalReserveBankReserveFund
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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