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Contingent Liabilities and Commitments with Off-Balance Sheet Risk - Additional Information (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitment to extend credit amount $ 238,130,000sbcf_CommitmentToExtendCreditAmount $ 135,056,000sbcf_CommitmentToExtendCreditAmount
Unfunded limited partner equity commitment 3,715,000sbcf_UnfundedLimitedPartnerEquityCommitment 3,746,000sbcf_UnfundedLimitedPartnerEquityCommitment
Maximum [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitment to extend credit fixed interest rate 5.125%sbcf_CommitmentToExtendCreditFixedInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Minimum [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitment to extend credit fixed interest rate 3.25%sbcf_CommitmentToExtendCreditFixedInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Secured Credit Risk [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Secured amount of commitment to extend credit 98,646,000sbcf_CommitmentToExtendCreditSecuredAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_SecuredDebtMember		  
Secured [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to extend credit 2,617,000us-gaap_SecuritiesReceivedAsCollateral
/ us-gaap_CreditFacilityAxis
= sbcf_FinancialStandbyLetterOfCreditSecuredMember		 3,187,000us-gaap_SecuritiesReceivedAsCollateral
/ us-gaap_CreditFacilityAxis
= sbcf_FinancialStandbyLetterOfCreditSecuredMember
Commitments to Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitment to extend credit amount 135,056,000sbcf_CommitmentToExtendCreditAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember		  
Fixed Interest Rate Credit Risk [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to extend credit fixed interest rate $ 10,052,000us-gaap_LoansAndLeasesReceivableCommitmentsFixedRates
/ us-gaap_FinancialInstrumentAxis
= us-gaap_InterestRateLockCommitmentsMember