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Contingent Liabilities and Commitments with Off-Balance Sheet Risk - Summary of Financial Instruments with Off-Balance-Sheet Risk (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Loss Contingencies [Line Items]    
Commitments to extend credit $ 238,130sbcf_CommitmentToExtendCreditAmount $ 135,056sbcf_CommitmentToExtendCreditAmount
Unfunded Limited Partner Equity Commitment 3,715sbcf_UnfundedLimitedPartnerEquityCommitment 3,746sbcf_UnfundedLimitedPartnerEquityCommitment
Secured    
Loss Contingencies [Line Items]    
Standby letters of credit and financial guarantees written 2,685us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sbcf_FinancialStandbyLetterOfCreditSecuredMember		 2,722us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sbcf_FinancialStandbyLetterOfCreditSecuredMember
Unsecured    
Loss Contingencies [Line Items]    
Standby letters of credit and financial guarantees written $ 200us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sbcf_FinancialStandbyLetterOfCreditUnsecuredMember		 $ 8us-gaap_GuaranteeObligationsCurrentCarryingValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sbcf_FinancialStandbyLetterOfCreditUnsecuredMember