XML 98 R81.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Fair Value Accounting - Assets And Liabilities Measured At Fair Value On A Non-Recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate | $ 11,818 | $ 1,819
Fair Value, Measurements, Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans | 19,482 | 44,802
Other real estate | 270 | 860
MPS receivable | 0 | 15,575
Other assets held for sale | $ 1,256 | 2,354
Fair Value, Measurements, Nonrecurring | Maximum | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 51.00% |
Fair Value, Measurements, Nonrecurring | Weighted Average | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 20.00% |
Fair Value, Measurements, Nonrecurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans | $ 0 | 0
Other real estate | 0 | 0
MPS receivable | 0 | 0
Other assets held for sale | 0 | 0
Fair Value, Measurements, Nonrecurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans | 0 | 0
Other real estate | 0 | 0
MPS receivable | 0 | 0
Other assets held for sale | 0 | 0
Fair Value, Measurements, Nonrecurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans | 19,482 | 44,802
Other real estate | 270 | 860
MPS receivable | 0 | 15,575
Other assets held for sale | $ 1,256 | $ 2,354
Fair Value, Measurements, Nonrecurring | Level 3 | Minimum | Collateral Dependent Impaired Loans | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 0.00% | 0.00%
Fair value inputs, estimated selling costs | 0.00% | 0.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Minimum | Other real estate | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 0.00% | 0.00%
Fair value inputs, estimated selling costs | 0.00% | 0.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Minimum | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 0.00% | 0.00%
Fair value inputs, estimated selling costs | 0.00% | 0.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Maximum | Collateral Dependent Impaired Loans | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 71.00% | 39.00%
Fair value inputs, estimated selling costs | 10.00% | 7.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Maximum | Other real estate | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 48.00% | 23.00%
Fair value inputs, estimated selling costs | 10.00% | 10.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Maximum | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate |  | 66.00%
Fair value inputs, estimated selling costs | 10.00% | 10.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Weighted Average | Collateral Dependent Impaired Loans | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 48.00% | 25.00%
Fair value inputs, estimated selling costs | 7.00% | 7.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Weighted Average | Other real estate | Third Party Appraised value of Real Estate Less Estimated Selling Costs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate | 24.00% | 12.00%
Fair value inputs, estimated selling costs | 7.00% | 7.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Weighted Average | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate |  | 45.00%
Fair value inputs, estimated selling costs | 7.00% | 7.00%

X
- Definition Fair Value Inputs, Estimated selling costs + References No definition available. + Details
Name: | syn_FairValueInputsEstimatedSellingCosts
Namespace Prefix: | syn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of other assets. + References No definition available. + Details
Name: | us-gaap_OtherAssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13728-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_ReceivablesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Discount rate used to estimate the fair value of servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122596-111746 + Details
Name: | us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=syn_OtherAssetsHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=syn_ThirdpartyappraisedvaluelessestimatedsellingcostsorBOVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=syn_CollateralDependentImpairedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=syn_ThirdPartyAppraisedValueOfRealEstateLessEstimatedSellingCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=syn_OtherRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |