XML 70 R58.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Commitments and Contingencies - Small Business Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Loss Contingencies [Line Items] |  |
Carry amount included in other assets | $ 571,976 | $ 573,992
Permanent and short-term construction loans and letter of credit commitments | 160,723 | 205,659
Funded portion of permanent and short-term loans and letters of credit | 227,180 | 211,921
Future funding commitment amount | 263,100 | 293,300
Letters of credit |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 176,324 | 200,269
Contractual amount net of risk participations | 18,400 | 22,800
Commitments to fund commercial and industrial loans |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 9,748,389 | 10,313,880
Commitments to fund commercial real estate, construction, and land development loans |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 2,189,478 | 2,496,656
Commitments under home equity lines of credit |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 2,128,208 | 2,135,120
Unused credit card lines |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 456,177 | 453,303
Other loan commitments |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 636,373 | 654,396
Total letters of credit and unfunded lending commitments |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 15,334,949 | 16,253,624
Permanent and short-term construction loans and letter of credit commitments |  |
Loss Contingencies [Line Items] |  |
Contractual amount net of risk participations | 7,100 | 9,700
Funded portion of permanent and short-term loans and letters of credit |  |
Loss Contingencies [Line Items] |  |
Contractual amount net of risk participations | $ 6,600 | $ 4,000

X
- Definition Contractual Amount Net Of Risk Participations + References No definition available. + Details
Name: | syn_ContractualAmountNetOfRiskParticipations
Namespace Prefix: | syn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Future Funding Commitment Amount Within Other Liabilities + References No definition available. + Details
Name: | syn_FutureFundingCommitmentAmountWithinOtherLiabilities
Namespace Prefix: | syn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax Credits, CRA Partnerships, And Other Investments, Carrying Amount Included In Other Assets + References No definition available. + Details
Name: | syn_TaxCreditsCRAPartnershipsAndOtherInvestmentsCarryingAmountIncludedInOtherAssets
Namespace Prefix: | syn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax Credits, CRA Partnerships, And Other Investments, Funded Portion Of Permanent And Short-Term Loans And Letters Of Credit + References No definition available. + Details
Name: | syn_TaxCreditsCRAPartnershipsAndOtherInvestmentsFundedPortionOfPermanentAndShortTermLoansAndLettersOfCredit
Namespace Prefix: | syn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax Credits, CRA Partnerships, And Other Investments, Permanent And Short-Term Construction Loans And Letter Of Credit Commitments + References No definition available. + Details
Name: | syn_TaxCreditsCRAPartnershipsAndOtherInvestmentsPermanentAndShortTermConstructionLoansAndLetterOfCreditCommitments
Namespace Prefix: | syn_
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-2 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_StandbyAndCommercialLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_CommitmentsToFundCommercialAndIndustrialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_CommitmentsToFundCommercialRealEstateConstructionAndLandDevelopmentLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_CommitmentsUnderHomeEquityLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_UnusedCreditCardLinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_OtherLoanCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_GuaranteeObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_PermanentAndShortTermConstructionLoansAndLetterOfCreditCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=syn_FundedPortionOfPermanentAndShortTermLoansAndLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |