XML 81 R67.htm IDEA: XBRL DOCUMENT v3.20.4

Investments in Securities - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Public deposits
Marketable Securities [Line Items]
Securities Owned and Pledged As Collateral Amortized Cost	$ 5,674	$ 8,578
Security Owned and Pledged as Collateral, Fair Value	5,962	8,913
Collateralized borrowing accounts
Marketable Securities [Line Items]
Securities Owned and Pledged As Collateral Amortized Cost	188,309	122,771
Security Owned and Pledged as Collateral, Fair Value	201,818	129,643
Other
Marketable Securities [Line Items]
Securities Owned and Pledged As Collateral Amortized Cost	6,413	7,021
Security Owned and Pledged as Collateral, Fair Value	6,819	7,107
Securities Pledged as Collateral
Marketable Securities [Line Items]
Securities Owned and Pledged As Collateral Amortized Cost	200,396	138,370
Security Owned and Pledged as Collateral, Fair Value	$ 214,599	$ 145,663

X

- Definition

Amount of securities owned and pledged as collateral amortized cost.

+ References

No definition available.

+ Details

Name:	gsbc_SecuritiesOwnedAndPledgedAsCollateralAmortizedCost
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

No definition available.

+ Details

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

X

- Definition

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

+ Details

Name:	us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=gsbc_PublicDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=gsbc_CollateralizedBorrowingAccountsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=gsbc_OtherPledgedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=gsbc_SecuritiesPledgedAsCollateral1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: