XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.20.2

SUBORDINATED DEBENTURES - Schedule of Trusts (Details) $ in Thousands | Sep. 30, 2020 USD ($) shares
--- | ---
Trust II |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Common securities liquidation value | $ 93
Trust III |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Common securities liquidation value | 62
DCB Trust I |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Common securities liquidation value | $ 155
Capital trust pass-through securities | Trust II |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Number of shares (in shares) | shares | 3,000
Original liquidation value | $ 3,000
Capital trust pass-through securities | Trust III |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Number of shares (in shares) | shares | 2,000
Original liquidation value | $ 2,000
Capital trust pass-through securities | DCB Trust I |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |
Number of shares (in shares) | shares | 5,000
Original liquidation value | $ 5,000

X
- Definition Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Common Securities Liquidation Value, Amount + References No definition available. + Details
Name: | gnty_FinancialInstrumentsSubjectToMandatoryRedemptionSettlementTermsCommonSecuritiesLiquidationValueAmount
Namespace Prefix: | gnty_
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_SharesSubjectToMandatoryRedemptionBySettlementTermsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount that would be paid, determined under the conditions specified in the contract, if the holder of the share has the right to redeem the shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879 + Details
Name: | us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares that would be issued, determined under the conditions specified in the contract, if the settlement were to occur at the reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879 + Details
Name: | us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=gnty_GuarantyTXCapitalTrustIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=gnty_GuarantyTXCapitalTrustIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=gnty_DCBTrustIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |