XML 66 R56.htm IDEA: XBRL DOCUMENT
v3.22.2

Derivative Instruments and Hedging Activities (Effect of Fair Value Hedges on Consolidated Statements of Income) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | $ (1,750) | $ (5,683) | $ 1,260 | $ (12)
Interest rate contracts | Capital markets income |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | 736 | (637) | 1,409 | 310
Mortgage derivatives | Mortgage derivatives - interest rate lock commitments | Mortgage banking income |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | 394 | (53) | (924) | (1,772)
Mortgage derivatives | Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans | Mortgage banking income |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | (3,210) | (4,974) | 355 | 1,268
Risk participation agreements | Capital markets income |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | 10 | (19) | 35 | 182
Foreign exchange contracts | Capital markets income |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | $ 320 | $ 0 | $ 385 | $ 0

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=syn_CapitalMarketsIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=syn_MortgageDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=syn_MortgageBankingIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=syn_ForwardcommitmentstosellfixedratemortgageloansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=syn_RiskParticipationAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |