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Borrowings - Additional Information (Details) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended
Nov. 27, 2007
Sep. 25, 2007
Dec. 31, 2014
Quarters
Jun. 29, 2007
Dec. 16, 2005
May 31, 2005
Debt Instrument [Line Items]            
Securities Sold Under Agreements To Repurchase Period Description     overnight to seven days      
Debt maturity date Nov. 27, 2017 Sep. 15, 2017        
Secured lines of credit     $ 1,259,345,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity      
Junior subordinated debentures           20,619,000sbcf_IssuanceOfJuniorSubordinatedDebentures
Aggregate subordinated debentures         41,238,000sbcf_AggregateJuniorSubordinatedDebentures  
Additional Junior subordinated debentures       12,372,000sbcf_IssuanceOfAdditionalJuniorSubordinatedDebentures 20,619,000sbcf_IssuanceOfAdditionalJuniorSubordinatedDebentures  
Trust Preferred Securities Redemption Description     The trust preferred securities have original maturities of thirty years, and may be redeemed without penalty on or after June 10, 2010, March 15, 2011, and September 15, 2012, respectively, upon approval of the Federal Reserve or upon occurrence of certain events affecting their tax or regulatory capital treatment.      
Original debt maturity, period     30 years      
Quarterly interest payment period for notes     20sbcf_MaximumPeriodicInterestPaymentPeriodQuarterlyOnNotes      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value     3,500,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1      
Trust I [Member]            
Debt Instrument [Line Items]            
Junior subordinated debentures private sales     20,000,000sbcf_IssuanceOfFloatingRatePreferredSecuritiesUnderPrivateSale
/ us-gaap_CreditFacilityAxis
= sbcf_TrustOneMember		      
Issued of common equity securities     619,000sbcf_IssuanceOfCommonEquitySecuritiesByTrust
/ us-gaap_CreditFacilityAxis
= sbcf_TrustOneMember		      
Trust II [Member]            
Debt Instrument [Line Items]            
Junior subordinated debentures private sales     20,000,000sbcf_IssuanceOfFloatingRatePreferredSecuritiesUnderPrivateSale
/ us-gaap_CreditFacilityAxis
= sbcf_TrustSecondMember		      
Issued of common equity securities     619,000sbcf_IssuanceOfCommonEquitySecuritiesByTrust
/ us-gaap_CreditFacilityAxis
= sbcf_TrustSecondMember		      
Trust III [Member]            
Debt Instrument [Line Items]            
Junior subordinated debentures private sales       12,000,000sbcf_IssuanceOfFloatingRatePreferredSecuritiesUnderPrivateSale
/ us-gaap_CreditFacilityAxis
= sbcf_TrustThirdMember		    
Issued of common equity securities     372,000sbcf_IssuanceOfCommonEquitySecuritiesByTrust
/ us-gaap_CreditFacilityAxis
= sbcf_TrustThirdMember		      
Junior subordinated deferrable interest notes issued     12,400,000sbcf_ProceedsFromJuniorSubordinatedDeferrableInterestNotes
/ us-gaap_CreditFacilityAxis
= sbcf_TrustThirdMember		      
Trust I & II [Member]            
Debt Instrument [Line Items]            
Junior subordinated deferrable interest notes issued     41,200,000sbcf_ProceedsFromJuniorSubordinatedDeferrableInterestNotes
/ us-gaap_CreditFacilityAxis
= sbcf_TrustFirstAndSecondMember		      
Federal Home Loan Bank [Member]            
Debt Instrument [Line Items]            
Advances received 25,000,000us-gaap_ProceedsFromFederalHomeLoanBankAdvances
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 25,000,000us-gaap_ProceedsFromFederalHomeLoanBankAdvances
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		        
Period Of Perpetual Option Conversion     3 months      
Libor Rate [Member] | Trust I [Member]            
Debt Instrument [Line Items]            
Basis points on variable rate, percentage     1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= sbcf_TrustOneMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
Adjust basis points on variable rate, percentage     2.01%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_CreditFacilityAxis
= sbcf_TrustOneMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
Libor Rate [Member] | Trust II [Member]            
Debt Instrument [Line Items]            
Basis points on variable rate, percentage     1.33%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= sbcf_TrustSecondMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
Adjust basis points on variable rate, percentage     1.57%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_CreditFacilityAxis
= sbcf_TrustSecondMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
Libor Rate [Member] | Trust III [Member]            
Debt Instrument [Line Items]            
Basis points on variable rate, percentage     1.35%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= sbcf_TrustThirdMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
Adjust basis points on variable rate, percentage     1.59%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_CreditFacilityAxis
= sbcf_TrustThirdMember
/ us-gaap_LongtermDebtTypeAxis
= sbcf_LiborRateMember		      
September 15, 2017 [Member]            
Debt Instrument [Line Items]            
Fixed rates advances     3.64%us-gaap_ShortTermDebtPercentageBearingFixedInterestRate
/ us-gaap_DebtInstrumentAxis
= sbcf_BorrowingMaturityDateOneMember		      
November 27, 2017 [Member]            
Debt Instrument [Line Items]            
Fixed rates advances     2.70%us-gaap_ShortTermDebtPercentageBearingFixedInterestRate
/ us-gaap_DebtInstrumentAxis
= sbcf_BorrowingMaturityDateTwoMember