XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.21.2

Mergers and Acquisitions- CSFL (Details) |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 01, 2021 USD ($) | Jun. 07, 2020 USD ($) $ / shares shares | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) $ / shares | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) $ / shares | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($)
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Goodwill |  |  | $ 1,581,085,000 |  | $ 1,581,085,000 |  | $ 1,563,942,000 |
Additional information |  |  |  |  |  |  |  |
Reversal of CSFL's ending allowance for credit losses |  |  | 5,662,000 | $ 2,431,000 | 9,036,000 | $ 5,654,000 |  |
Proforma amounts |  |  |  |  |  |  |  |
Total revenues (net interest income plus noninterest income) |  |  |  | 415,540,000 |  | 789,681,000 |  |
Net interest income |  |  |  | 266,922,000 |  | 541,141,000 |  |
Net adjusted income available to the common shareholder |  |  |  | $ 25,626,000 |  | $ 115,616,000 |  |
EPS - basic | $ / shares |  |  |  | $ 0.36 |  | $ 1.63 |  |
EPS - diluted | $ / shares |  |  |  | $ 0.36 |  | $ 1.62 |  |
CSFL |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired [Abstract] |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ 2,566,450,000 |  |  |  |  |  |
Investment securities |  | 1,193,910,000 |  |  |  |  |  |
Loans held for sale |  | 453,578,000 |  |  |  |  |  |
Loans, net of allowance and mark |  | 12,950,583,000 |  |  |  |  |  |
Premises and equipment |  | 313,435,000 |  |  |  |  |  |
Intangible assets |  | 140,862,000 |  |  |  |  |  |
OREO and repossessed assets |  | 10,009,000 |  |  |  |  |  |
Bank owned life insurance |  | 333,053,000 |  |  |  |  |  |
Deferred tax asset |  | 37,622,000 |  |  |  |  |  |
Other assets |  | 965,386,000 |  |  |  |  |  |
Total assets |  | 18,964,888,000 |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Noninterest-bearing |  | 5,291,443,000 |  |  |  |  |  |
Interest-bearing |  | 10,332,072,000 |  |  |  |  |  |
Total deposits |  | 15,623,515,000 |  |  |  |  |  |
Federal funds purchased and securities sold under agreements to repurchase |  | 401,546,000 |  |  |  |  |  |
Other borrowings |  | 271,499,000 |  |  |  |  |  |
Other liabilities |  | 973,990,000 |  |  |  |  |  |
Total liabilities |  | 17,270,550,000 |  |  |  |  |  |
Net identifiable assets acquired over (under) liabilities assumed |  | 1,694,338,000 |  |  |  |  |  |
Goodwill |  | 562,370,000 | 562,400,000 |  | 562,400,000 |  | 562,400,000 |
Net assets acquired over liabilities assumed |  | $ 2,256,708,000 |  |  |  |  |  |
Consideration: |  |  |  |  |  |  |  |
Number of shares issued as consideration | shares |  | 37,271,069 |  |  |  |  |  |
Purchase price per share of the Company's common stock | $ / shares |  | $ 60.27 |  |  |  |  |  |
Company common stock issued ($2,246,327) and cash exchanged for fractional shares ($74) |  | $ 2,246,401,000 |  |  |  |  |  |
Stock option conversion |  | 2,900,000 |  |  |  |  |  |
Restricted stock conversion |  | 7,407,000 |  |  |  |  |  |
Value of common stock issued for fractional shares |  | 2,246,327,000 |  |  |  |  |  |
Price per fractional share |  | 74,000 |  |  |  |  |  |
Cash paid for stock options outstanding |  | 2,900,000 |  |  |  |  |  |
Fair value of total consideration transferred |  | 2,256,708,000 |  |  |  |  |  |
Noncash Merger Related Costs |  | 2,900,000 |  |  |  |  |  |
Merger-related charges/costs |  |  | 33,000,000.0 | $ 40,200,000 | 43,000,000.0 | $ 44,300,000 |  |
Additional information |  |  |  |  |  |  |  |
Reversal of CSFL's existing fair value adjustments |  | 40,700,000 |  |  |  |  |  |
Adjustment to record securities at fair value (premium) |  | 46,200,000 |  |  |  |  |  |
Reclassification of securities held as HTM to AFS |  | 175,700,000 |  |  |  |  |  |
Total mark of the loan portfolio |  | $ 269,100,000 |  |  |  |  |  |
Total mark of the loan portfolio (as a percent) |  | 2.04% |  |  |  |  |  |
Credit mark of the loan portfolio |  | $ 259,700,000 |  |  |  |  |  |
Credit mark of the loan portfolio (as a percent) |  | 1.97% |  |  |  |  |  |
Reversal of CSFL's ending allowance for credit losses |  | $ 158,200,000 |  |  |  |  |  |
Fair value adjustments of allowance for credit losses |  | 62,600,000 |  |  |  |  |  |
MTM adjustment on leased assets |  | 4,000,000.0 |  |  |  |  |  |
Deminimus fixed assets written off |  | $ 1,600,000 |  |  |  |  |  |
Core deposit intangible from a third party valuation (as a percent) |  | 1.28 |  |  |  |  |  |
Core deposit intangible from a third party valuation |  | $ 125,900,000 |  |  |  |  |  |
Existing core deposit intangible from prior transactions that was reversed |  | 84,900,000 |  |  |  |  |  |
Existing goodwill from prior transactions that was reversed |  | 1,200,000,000 |  |  |  |  |  |
Reversal of prior valuation reserves |  | 878,000 |  |  |  |  |  |
New valuation reserves |  | $ 1,700,000 |  |  |  |  |  |
Deferred tax assets related to fair value adjustments with effective tax rate |  | 22.00% |  |  |  |  |  |
Fair value adjustment of bank property held for sale |  | $ 4,400,000 |  |  |  |  |  |
Fair value adjustment of lease receivable |  | 116,000 |  |  |  |  |  |
Fair value adjustment of interest receivable |  | 501,000 |  |  |  |  |  |
Fair value negative adjustment for investment in low income housing |  | 3,300,000 |  |  |  |  |  |
Estimated premium for fixed maturity time deposits |  | 20,200,000 |  |  |  |  |  |
Reversal of existing CSFL fair value adjustments related to time deposit marks from other merger transactions |  | 546,000 |  |  |  |  |  |
Discount on TRUPs from a third party valuation |  | 12,500,000 |  |  |  |  |  |
Reversal of the existing CSFL discount on TRUPs and other debt |  | 5,100,000 |  |  |  |  |  |
Reversal of an existing unfunded commitment reserve at purchase date |  | 7,100,000 |  |  |  |  |  |
Fair value adjustment to increase lease liabilities associated with rental facilities |  | 2,500,000 |  |  |  |  |  |
Fair value adjustments to employee benefit plans |  | 5,200,000 |  |  |  |  |  |
Merger-related charges/costs |  |  | 33,000,000.0 | $ 40,200,000 | 43,000,000.0 | $ 44,300,000 |  |
CSFL | As Recorded by CSFL |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired [Abstract] |  |  |  |  |  |  |  |
Cash and cash equivalents |  | 2,566,450,000 |  |  |  |  |  |
Investment securities |  | 1,188,403,000 |  |  |  |  |  |
Loans held for sale |  | 453,578,000 |  |  |  |  |  |
Loans, net of allowance and mark |  | 12,969,091,000 |  |  |  |  |  |
Premises and equipment |  | 308,150,000 |  |  |  |  |  |
Intangible assets |  | 1,294,211,000 |  |  |  |  |  |
OREO and repossessed assets |  | 10,849,000 |  |  |  |  |  |
Bank owned life insurance |  | 333,053,000 |  |  |  |  |  |
Deferred tax asset |  | 54,123,000 |  |  |  |  |  |
Other assets |  | 967,059,000 |  |  |  |  |  |
Total assets |  | 20,144,967,000 |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Noninterest-bearing |  | 5,291,443,000 |  |  |  |  |  |
Interest-bearing |  | 10,312,370,000 |  |  |  |  |  |
Total deposits |  | 15,603,813,000 |  |  |  |  |  |
Federal funds purchased and securities sold under agreements to repurchase |  | 401,546,000 |  |  |  |  |  |
Other borrowings |  | 278,900,000 |  |  |  |  |  |
Other liabilities |  | 977,725,000 |  |  |  |  |  |
Total liabilities |  | 17,261,984,000 |  |  |  |  |  |
Net identifiable assets acquired over (under) liabilities assumed |  | 2,882,983,000 |  |  |  |  |  |
Net assets acquired over liabilities assumed |  | 2,882,983,000 |  |  |  |  |  |
CSFL | Initial Fair Value Adjustments |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired [Abstract] |  |  |  |  |  |  |  |
Investment securities |  | 5,507,000 |  |  |  |  |  |
Loans, net of allowance and mark |  | (48,342,000) |  |  |  |  |  |
Premises and equipment |  | 2,392,000 |  |  |  |  |  |
Intangible assets |  | (1,163,349,000) |  |  |  |  |  |
OREO and repossessed assets |  | (791,000) |  |  |  |  |  |
Deferred tax asset |  | (8,681,000) |  |  |  |  |  |
Other assets |  | (604,000) |  |  |  |  |  |
Total assets |  | (1,213,868,000) |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Interest-bearing |  | 19,702,000 |  |  |  |  |  |
Total deposits |  | 19,702,000 |  |  |  |  |  |
Other borrowings |  | (7,401,000) |  |  |  |  |  |
Other liabilities |  | (4,592,000) |  |  |  |  |  |
Total liabilities |  | 7,709,000 |  |  |  |  |  |
Net identifiable assets acquired over (under) liabilities assumed |  | (1,221,577,000) |  |  |  |  |  |
Goodwill |  | 600,483,000 |  |  |  |  |  |
Net assets acquired over liabilities assumed |  | (621,094,000) |  |  |  |  |  |
CSFL | Subsequent Fair Value Adjustments |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired [Abstract] |  |  |  |  |  |  |  |
Loans, net of allowance and mark |  | 29,834,000 |  |  |  |  |  |
Premises and equipment |  | 2,893,000 |  |  |  |  |  |
Intangible assets |  | 10,000,000 |  |  |  |  |  | $ 10,000,000.0
OREO and repossessed assets |  | (49,000) |  |  |  |  |  |
Deferred tax asset |  | (7,820,000) |  |  |  |  |  |
Other assets |  | (1,069,000) |  |  |  |  |  |
Total assets |  | 33,789,000 |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Other liabilities |  | 857,000 |  |  |  |  |  |
Total liabilities |  | 857,000 |  |  |  |  |  |
Net identifiable assets acquired over (under) liabilities assumed |  | 32,932,000 |  |  |  |  |  |
Goodwill |  | (38,113,000) | $ 38,100,000 |  | $ 38,100,000 |  | $ 38,100,000 |
Net assets acquired over liabilities assumed |  | (5,181,000) |  |  |  |  |  |
CSFL | Subsequent Fair Value Adjustments |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Other liabilities |  | $ 857,000 |  |  |  |  |  |
Additional information |  |  |  |  |  |  |  |
Deferred tax assets related to fair value adjustments with effective tax rate |  | 23.78% |  |  |  |  |  |
Duncan-Williams, Inc. |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities [Abstract] |  |  |  |  |  |  |  |
Goodwill | $ 15,800,000 |  |  |  |  |  |  |
Consideration: |  |  |  |  |  |  |  |
Fair value of total consideration transferred | 48,300,000 |  |  |  |  |  |  |
Additional premium paid after three years | $ 8,000,000.0 |  |  |  |  |  |  |

X
- Definition n/a + References No definition available. + Details
Name: | ssb_AdditionalInformationAbstract
Namespace Prefix: | ssb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of adjustment to loans receivable on account of credit mark. + References No definition available. + Details
Name: | ssb_AdjustmentToLoansReceivableOnAccountOfCreditMark
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of adjustment to loans receivable on account of fair value mark. + References No definition available. + Details
Name: | ssb_AdjustmentToLoansReceivableOnAccountOfFairValueMark
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the percentage of adjustment to loans receivable on account of credit mark. + References No definition available. + Details
Name: | ssb_AdjustmentToPercentageOfLoansReceivableOnAccountOfCreditMark
Namespace Prefix: | ssb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of adjustment to loans receivable on account of fair value mark. + References No definition available. + Details
Name: | ssb_AdjustmentToPercentageOfLoansReceivableOnAccountOfFairValueMark
Namespace Prefix: | ssb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the value of restricted stock of the acquired entity converted as a part of consideration for acquisition. + References No definition available. + Details
Name: | ssb_BusinessAcquisitionCostOfAcquiredEntityConversionOfRestrictedStock
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the value of stock options of the acquired entity converted as a part of consideration for acquisition. + References No definition available. + Details
Name: | ssb_BusinessAcquisitionCostOfAcquiredEntityConversionOfStockOptions
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the adjustment to record securities at fair value (premium). + References No definition available. + Details
Name: | ssb_BusinessCombinationAdjustmentToRecordSecuritiesAtFairValuePremium
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the business combination deposit premium payable after three years. + References No definition available. + Details
Name: | ssb_BusinessCombinationDepositPremiumPayableAfterThreeYears
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the price paid per fractional share in a business combination. + References No definition available. + Details
Name: | ssb_BusinessCombinationPricePerFractionalShare
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of bank owned life insurance on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy, as of acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of deposit liabilities assumed which have been recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDepositLiabilities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of interest bearing deposit liabilities assumed which have been recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInterestBearingDepositLiabilities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of investment securities recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentSecurities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans held for sale recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans receivable recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of noninterest-bearing deposit liabilities assumed which have been recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoninterestBearingDepositLiabilities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of other borrowings assumed which have been recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of other real estate owned and repossessed assets recognized as of the acquisition date. + References No definition available. + Details
Name: | ssb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwnedAndRepossessedAssets
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the reversal of acquiree's existing fair value adjustments. + References No definition available. + Details
Name: | ssb_BusinessCombinationReversalOfExistingFairValueAdjustments
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of stock issued and cash paid for acquisition. + References No definition available. + Details
Name: | ssb_BusinessCombinationStockIssuedAndCashPaidForFractionalShares
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the value of stock issued for fractional shares in a business combination. + References No definition available. + Details
Name: | ssb_BusinessCombinationValueStockIssuedForFractionalShares
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the reclassification of securities held as HTM to AFS. + References No definition available. + Details
Name: | ssb_DebtSecuritiesReclassificationOfSecuritiesToAvailableForSale
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of deminimus fixed assets written off. + References No definition available. + Details
Name: | ssb_DeminimusFixedAssetsWrittenOff
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the discount on TRUPs from a third party valuation. + References No definition available. + Details
Name: | ssb_DiscountOnTrupsFromThirdPartyValuation
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of addition (reduction) to the amount of the employee benefit plan. + References No definition available. + Details
Name: | ssb_EmployeeBenefitPlanFairValueAdjustment
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the estimated premium for fixed maturity time deposits. + References No definition available. + Details
Name: | ssb_EstimatedPremiumForFixedMaturityTimeDeposits
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the existing goodwill from prior transactions that was reversed. + References No definition available. + Details
Name: | ssb_ExistingGoodwillReversed
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the existing core deposit intangible from prior transactions that was reversed. + References No definition available. + Details
Name: | ssb_ExistingIntangibleAssetsReversed
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the fair value adjustment of bank property held for sale. + References No definition available. + Details
Name: | ssb_FairValueAdjustmentBankPropertyHeldForSale
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the fair value of interest receivable. + References No definition available. + Details
Name: | ssb_FairValueAdjustmentInterestReceivable
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the fair value adjustment of lease receivable. + References No definition available. + Details
Name: | ssb_FairValueAdjustmentLeaseReceivable
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the fair value adjustment to increase lease liabilities associated with rental facilities. + References No definition available. + Details
Name: | ssb_FairValueAdjustmentToIncreaseLeaseLiabilitiesAssociatedWithRentalFacilities
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the fair value negative adjustment for investment in low income housing. + References No definition available. + Details
Name: | ssb_FairValueNegativeAdjustmentInvestmentInLowIncomeHousing
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of fair value adjustments of allowance for credit losses. + References No definition available. + Details
Name: | ssb_FinancingReceivableAllowanceForCreditLossFairValueAdjustment
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Core deposit intangible from a third party valuation. + References No definition available. + Details
Name: | ssb_IntangibleAssetsFromThirdPartyValuation
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of MTM adjustment on leased assets. + References No definition available. + Details
Name: | ssb_MarkToMarketAdjustmentOnLeasedAssets
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of valuation reserve for OREO and other repossessed assets. + References No definition available. + Details
Name: | ssb_OreoAndOtherRepossessedAssetsNewValuationReserves
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reversal of prior valuation reserves for OREO and other repossessed assets. + References No definition available. + Details
Name: | ssb_OreoAndOtherRepossessedAssetsReversalOfPriorValuationReserves
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentages of core deposit intangible from a third party valuation. + References No definition available. + Details
Name: | ssb_PercentagesOfIntangibleAssetsFromThirdPartyValuation
Namespace Prefix: | ssb_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the reversal of the existing CSFL discount on TRUPs and other debt. + References No definition available. + Details
Name: | ssb_ReversalOfDiscountOnTrupsFromThirdPartyValuation
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the reversal of existing CSFL fair value adjustments related to time deposit marks from other merger transactions. + References No definition available. + Details
Name: | ssb_ReversalOfExistingFairValueAdjustmentsRelatedToTimeDepositMarksFromOtherMergerTransactions
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the reversal of an existing unfunded commitment reserve at purchase date. + References No definition available. + Details
Name: | ssb_ReversalOfExistingUnfundedCommitmentReserveAtPurchaseDate
Namespace Prefix: | ssb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionsProFormaRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after offset of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price. + 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 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + 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(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expense (income) related to the increase (decrease) in reserve for business combination costs. Includes, but is not limited to, legal, accounting, and other costs incurred to consummate the merger. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_NoncashMergerRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ssb_CenterstateBankCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=ssb_AsRecordedByCsflMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=ssb_InitialFairValueAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=ssb_SubsequentFairValueAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=ssb_SubsequentFairValueAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ssb_DuncanWilliamsInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |