XML 53 R41.htm IDEA: XBRL DOCUMENT v3.21.2

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) Contract	Sep. 30, 2020 USD ($) Contract	Sep. 30, 2021 USD ($) Contract	Sep. 30, 2020 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	92	80	290	280
Recorded investment	$ 15,229,000	$ 8,144,000	$ 37,504,000	$ 60,492,000
Net charge-offs	$ 0	$ 0	$ 0	$ 0
Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	54	49	122	137
Recorded investment	$ 9,036,000	$ 5,758,000	$ 20,583,000	$ 18,346,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	44	42	102	118
Recorded investment	$ 6,079,000	$ 4,005,000	$ 14,819,000	$ 13,243,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	10	7	20	19
Recorded investment	$ 2,957,000	$ 1,753,000	$ 5,764,000	$ 5,103,000
Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	7	8	22	24
Recorded investment	$ 1,374,000	$ 615,000	$ 4,846,000	$ 31,609,000
Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	2	2	8	6
Recorded investment	$ 637,000	$ 387,000	$ 3,040,000	$ 29,056,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	3	5	10	15
Recorded investment	$ 84,000	$ 188,000	$ 744,000	$ 1,972,000
Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	2	1	4	3
Recorded investment	$ 653,000	$ 40,000	$ 1,062,000	$ 581,000
Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	31	23	146	119
Recorded investment	$ 4,819,000	$ 1,771,000	$ 12,075,000	$ 10,537,000
Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	8	3	10	19
Recorded investment	$ 1,644,000	$ 519,000	$ 1,975,000	$ 4,157,000
Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	16	17	43	50
Recorded investment	$ 2,655,000	$ 1,119,000	$ 4,400,000	$ 3,456,000
Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	7	3	93	50
Recorded investment	$ 520,000	$ 133,000	$ 5,700,000	$ 2,924,000
Below Market Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	11,064,000	6,511,000	24,001,000	45,185,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	5,925,000	5,088,000	13,337,000	12,135,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	3,437,000	3,335,000	8,440,000	8,562,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	2,488,000	1,753,000	4,897,000	3,573,000
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	1,273,000	408,000	4,664,000	30,411,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	637,000	294,000	3,040,000	28,963,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	74,000	621,000	867,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	636,000	40,000	1,003,000	581,000
Below Market Interest Rate | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	3,866,000	1,015,000	6,000,000	2,639,000
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	1,167,000	496,000	1,498,000	1,568,000
Below Market Interest Rate | Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	2,655,000	471,000	4,142,000	926,000
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	44,000	48,000	360,000	145,000
Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	4,165,000	1,633,000	13,503,000	15,307,000
Other Concessions | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	3,111,000	670,000	7,246,000	6,211,000
Other Concessions | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	2,642,000	670,000	6,379,000	4,681,000
Other Concessions | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	469,000	0	867,000	1,530,000
Other Concessions | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	101,000	207,000	182,000	1,198,000
Other Concessions | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	93,000	0	93,000
Other Concessions | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	84,000	114,000	123,000	1,105,000
Other Concessions | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	17,000	0	59,000	0
Other Concessions | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	953,000	756,000	6,075,000	7,898,000
Other Concessions | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	477,000	23,000	477,000	2,589,000
Other Concessions | Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	648,000	258,000	2,530,000
Other Concessions | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	476,000	85,000	5,340,000	2,779,000
Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	$ 0	$ 0	$ 0	$ 0

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

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=syn_CommercialAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_CommercialFinancialandAgriculturalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_OwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_InvestmentPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_OneToFourFamilyPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_LandAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=syn_OtherConsumerLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_InterestRateBelowMarketReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=syn_TermExtensionsAndOrOtherConcessionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PrincipalForgivenessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: