XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.21.2

Investment Securities - Amortized cost and fair value for available for sale securities (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
investment securities held-to-maturity |  |  |  |  |
Amortized cost | $ 1,641,485,000 |  | $ 1,641,485,000 |  | $ 955,542,000
Gross Unrealized Gains | 83,000 |  | 83,000 |  | 2,764,000
Gross Unrealized Losses | (34,384,000) |  | (34,384,000) |  | (1,123,000)
Fair Value | 1,607,184,000 |  | 1,607,184,000 |  | 957,183,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 4,632,039,000 |  | 4,632,039,000 |  | 3,268,037,000
Gross Unrealized Gains | 42,766,000 |  | 42,766,000 |  | 66,800,000
Gross Unrealized Losses | (43,251,000) |  | (43,251,000) |  | (4,165,000)
Fair Value | 4,631,554,000 |  | 4,631,554,000 |  | 3,330,672,000
Gross realized gains | 680,000 | $ 469,000 | 748,000 | $ 469,000 |
Gross realized losses | 615,000 | 454,000 | 648,000 | 454,000 |
Net realized gain (loss) | 65,000 | $ 15,000 | 100,000 | $ 15,000 |
U.S. Government agencies |  |  |  |  |
investment securities held-to-maturity |  |  |  |  |
Amortized cost | 87,912,000 |  | 87,912,000 |  | 25,000,000
Gross Unrealized Gains |  |  |  |  | 1,000
Gross Unrealized Losses | (2,162,000) |  | (2,162,000) |  |
Fair Value | 85,750,000 |  | 85,750,000 |  | 25,001,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 74,336,000 |  | 74,336,000 |  | 29,882,000
Gross Unrealized Gains |  |  |  |  | 16,000
Gross Unrealized Losses | (1,493,000) |  | (1,493,000) |  | (642,000)
Fair Value | 72,843,000 |  | 72,843,000 |  | 29,256,000
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises |  |  |  |  |
investment securities held-to-maturity |  |  |  |  |
Amortized cost | 1,028,847,000 |  | 1,028,847,000 |  | 632,269,000
Gross Unrealized Gains |  |  |  |  | 1,827,000
Gross Unrealized Losses | (19,505,000) |  | (19,505,000) |  | (1,032,000)
Fair Value | 1,009,342,000 |  | 1,009,342,000 |  | 633,064,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 1,639,495,000 |  | 1,639,495,000 |  | 1,351,506,000
Gross Unrealized Gains | 8,307,000 |  | 8,307,000 |  | 16,657,000
Gross Unrealized Losses | (17,354,000) |  | (17,354,000) |  | (1,031,000)
Fair Value | 1,630,448,000 |  | 1,630,448,000 |  | 1,367,132,000
Agencies or sponsored enterprises |  |  |  |  |
investment securities held-to-maturity |  |  |  |  |
Amortized cost | 144,540,000 |  | 144,540,000 |  | 75,767,000
Gross Unrealized Gains |  |  |  |  | 405,000
Gross Unrealized Losses | (4,029,000) |  | (4,029,000) |  |
Fair Value | 140,511,000 |  | 140,511,000 |  | 76,172,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 703,245,000 |  | 703,245,000 |  | 739,797,000
Gross Unrealized Gains | 9,924,000 |  | 9,924,000 |  | 16,579,000
Gross Unrealized Losses | (5,041,000) |  | (5,041,000) |  | (825,000)
Fair Value | 708,128,000 |  | 708,128,000 |  | 755,551,000
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises |  |  |  |  |
investment securities held-to-maturity |  |  |  |  |
Amortized cost | 316,330,000 |  | 316,330,000 |  | 174,506,000
Gross Unrealized Gains | 83,000 |  | 83,000 |  | 300,000
Gross Unrealized Losses | (6,586,000) |  | (6,586,000) |  | (91,000)
Fair Value | 309,827,000 |  | 309,827,000 |  | 174,715,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 1,003,259,000 |  | 1,003,259,000 |  | 229,219,000
Gross Unrealized Gains | 7,294,000 |  | 7,294,000 |  | 10,939,000
Gross Unrealized Losses | (11,265,000) |  | (11,265,000) |  | (50,000)
Fair Value | 999,288,000 |  | 999,288,000 |  | 240,108,000
State and municipal obligations |  |  |  |  |
Investment securities available for sale |  |  |  |  |
Amortized cost | 720,417,000 |  | 720,417,000 |  | 502,575,000
Gross Unrealized Gains | 13,218,000 |  | 13,218,000 |  | 17,491,000
Gross Unrealized Losses | (4,033,000) |  | (4,033,000) |  | (27,000)
Fair Value | 729,602,000 |  | 729,602,000 |  | 520,039,000
Small Business Administration loan-backed securities |  |  |  |  |
investment securities held-to-maturity |  |  |  |  |
Amortized cost | 63,856,000 |  | 63,856,000 |  | 48,000,000
Gross Unrealized Gains |  |  |  |  | 231,000
Gross Unrealized Losses | (2,102,000) |  | (2,102,000) |  |
Fair Value | 61,754,000 |  | 61,754,000 |  | 48,231,000
Investment securities available for sale |  |  |  |  |
Amortized cost | 477,765,000 |  | 477,765,000 |  | 401,496,000
Gross Unrealized Gains | 3,700,000 |  | 3,700,000 |  | 4,978,000
Gross Unrealized Losses | (4,065,000) |  | (4,065,000) |  | (1,590,000)
Fair Value | 477,400,000 |  | 477,400,000 |  | 404,884,000
Corporate securities. |  |  |  |  |
Investment securities available for sale |  |  |  |  |
Amortized cost | 13,522,000 |  | 13,522,000 |  | 13,562,000
Gross Unrealized Gains | 323,000 |  | 323,000 |  | 140,000
Fair Value | $ 13,845,000 |  | $ 13,845,000 |  | $ 13,702,000

X
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtSecuritiesHeldtomaturityAllowanceForCreditLossAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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

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