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INCOME TAXES - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating Loss Carryforwards [Line Items]    
Net deferred tax assets $ 61.5us-gaap_DeferredTaxAssetsLiabilitiesNet $ 61.5us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred tax assets not related to net operating losses or credits 36sbcf_DeferredTaxAssetsGrossAmountNotRelatedToNetOperatingLossesOrCredits  
Alternative minimum tax credits 0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax  
Effective Income Tax Rate Reconciliation, Percent 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations  
Deferred Tax Assets Related to State Net Operating Losses 7sbcf_DefferedTaxAssetsReatedToStateNetOperatingLosses  
Minimum [Member]    
Operating Loss Carryforwards [Line Items]    
Annual income before taxes 2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
State [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Operating Loss Carryforwards 0us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
/ us-gaap_UnderlyingAssetClassAxis
= sbcf_StateMember
 
State [Member] | Maximum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carry forwards Expiration Period 2034  
State [Member] | Minimum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carry forwards Expiration Period 2028  
Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets, Operating Loss Carryforwards 0us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
/ us-gaap_ShortTermDebtTypeAxis
= sbcf_FederalMember
 
Federal [Member] | Maximum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carry forwards Expiration Period 2032  
Federal [Member] | Minimum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carry forwards Expiration Period 2029  
U.S. Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Alternative minimum tax credits $ 0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
/ us-gaap_ShortTermDebtTypeAxis
= sbcf_USFederalMember