IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio and Related Allowance (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Carrying Value
Individually Evaluated for Impairment	$ 40,887	$ 43,577
Collectively Evaluated for Impairment	1,806,481	1,770,494
Total	1,847,368	1,814,071
Associated Allowance
Individually Evaluated for Impairment	3,323	3,541
Collectively Evaluated for Impairment	14,305	13,466
Total	17,628	17,007
PCI Loans [Member]
Carrying Value
Total	7,119	7,814
Associated Allowance
Total	93	64
Construction and Land Development [Member]
Carrying Value
Individually Evaluated for Impairment	2,648	2,710
Collectively Evaluated for Impairment	96,221	82,769
Total	98,869	85,479
Associated Allowance
Individually Evaluated for Impairment	136	159
Collectively Evaluated for Impairment	706	563
Total	842	722
Construction and Land Development [Member] \| PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	1,472	1,557
Associated Allowance
Individually Evaluated for Impairment	81	43
Commercial Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	10,307	11,446
Collectively Evaluated for Impairment	834,933	821,609
Total	845,240	833,055
Associated Allowance
Individually Evaluated for Impairment	467	529
Collectively Evaluated for Impairment	4,360	3,999
Total	4,827	4,528
Commercial Real Estate [Member] \| PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	3,684	4,092
Associated Allowance
Individually Evaluated for Impairment	5	3
Residential Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	27,167	28,702
Collectively Evaluated for Impairment	655,732	657,344
Total	682,899	686,046
Associated Allowance
Individually Evaluated for Impairment	2,569	2,741
Collectively Evaluated for Impairment	7,097	7,043
Total	9,666	9,784
Residential Real Estate [Member] \| PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	699	851
Associated Allowance
Individually Evaluated for Impairment	5	18
Commercial And Financial [Member]
Carrying Value
Individually Evaluated for Impairment	117	120
Collectively Evaluated for Impairment	162,670	155,964
Total	162,787	156,084
Associated Allowance
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	1,374	1,179
Total	1,374	1,179
Commercial And Financial [Member] \| PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	1,263	1,312
Associated Allowance
Individually Evaluated for Impairment	2	0
Consumer [Member]
Carrying Value
Individually Evaluated for Impairment	648	599
Collectively Evaluated for Impairment	56,925	52,808
Total	57,573	53,407
Associated Allowance
Individually Evaluated for Impairment	151	112
Collectively Evaluated for Impairment	768	682
Total	919	794
Consumer [Member] \| PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	1	2
Associated Allowance
Individually Evaluated for Impairment	$ 0	$ 0

A valuation allowance for financing receivables that are expected to be uncollectible.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LoansAndLeasesReceivableLoansInProcessAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LoansAndLeasesReceivableNetReportedAmountAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringAxis=us-gaap_ConstructionPermitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=sbcf_PurchasedCreditImpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: