Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

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

- Definition

Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

+ Details

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

- Definition

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sbcf_GulfShoreBancSharesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=sbcf_SingleFamilyResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=sbcf_ConstructionDevelopmentLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=sbcf_ConsumerAndOtherLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=sbcf_PurchasedCreditImpairedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sbcf_NorthstarBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sbcf_PalmBeachCommunityBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sbcf_FirstGreenBancorpInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Business Combinations - Fair Value of Acquired Loans (Details) - USD ($) $ in Thousands	Oct. 19, 2018	Nov. 03, 2017	Oct. 20, 2017	Apr. 07, 2017
Gulf Shore Banc shares Inc
Business Acquisition [Line Items]
Book Balance				$ 256,876
Fair Value				250,876
Gulf Shore Banc shares Inc \| Commercial real estate
Business Acquisition [Line Items]
Book Balance				106,729
Fair Value				103,905
Gulf Shore Banc shares Inc \| Commercial loans
Business Acquisition [Line Items]
Book Balance				32,137
Fair Value				32,247
Gulf Shore Banc shares Inc \| Single family residential real estate
Business Acquisition [Line Items]
Book Balance				101,281
Fair Value				99,598
Gulf Shore Banc shares Inc \| Construction/development/land
Business Acquisition [Line Items]
Book Balance				13,175
Fair Value				11,653
Gulf Shore Banc shares Inc \| Consumer and other loans
Business Acquisition [Line Items]
Book Balance				3,554
Fair Value				3,473
Gulf Shore Banc shares Inc \| PCI Loans
Business Acquisition [Line Items]
Book Balance				0
Fair Value				$ 0
NorthStar Bank
Business Acquisition [Line Items]
Book Balance			$ 143,444
Fair Value			136,832
NorthStar Bank \| Commercial real estate
Business Acquisition [Line Items]
Book Balance			73,139
Fair Value			69,554
NorthStar Bank \| Commercial loans
Business Acquisition [Line Items]
Book Balance			31,200
Fair Value			30,854
NorthStar Bank \| Single family residential real estate
Business Acquisition [Line Items]
Book Balance			15,111
Fair Value			15,096
NorthStar Bank \| Construction/development/land
Business Acquisition [Line Items]
Book Balance			11,706
Fair Value			10,390
NorthStar Bank \| Consumer and other loans
Business Acquisition [Line Items]
Book Balance			6,761
Fair Value			6,645
NorthStar Bank \| PCI Loans
Business Acquisition [Line Items]
Book Balance			5,527
Fair Value			$ 4,293
Palm Beach Community Bank
Business Acquisition [Line Items]
Book Balance		$ 275,567
Fair Value		270,318
Palm Beach Community Bank \| Commercial real estate
Business Acquisition [Line Items]
Book Balance		134,705
Fair Value		132,089
Palm Beach Community Bank \| Commercial loans
Business Acquisition [Line Items]
Book Balance		36,076
Fair Value		35,876
Palm Beach Community Bank \| Single family residential real estate
Business Acquisition [Line Items]
Book Balance		30,153
Fair Value		30,990
Palm Beach Community Bank \| Construction/development/land
Business Acquisition [Line Items]
Book Balance		69,686
Fair Value		67,425
Palm Beach Community Bank \| Consumer and other loans
Business Acquisition [Line Items]
Book Balance		179
Fair Value		172
Palm Beach Community Bank \| PCI Loans
Business Acquisition [Line Items]
Book Balance		4,768
Fair Value		$ 3,766
First Green Bancorp, Inc.
Business Acquisition [Line Items]
Book Balance	$ 668,216
Fair Value	631,497
First Green Bancorp, Inc. \| Commercial real estate
Business Acquisition [Line Items]
Book Balance	437,767
Fair Value	406,613
First Green Bancorp, Inc. \| Commercial loans
Business Acquisition [Line Items]
Book Balance	56,288
Fair Value	54,973
First Green Bancorp, Inc. \| Single family residential real estate
Business Acquisition [Line Items]
Book Balance	101,674
Fair Value	101,119
First Green Bancorp, Inc. \| Construction/development/land
Business Acquisition [Line Items]
Book Balance	61,195
Fair Value	58,385
First Green Bancorp, Inc. \| Consumer and other loans
Business Acquisition [Line Items]
Book Balance	9,156
Fair Value	8,942
First Green Bancorp, Inc. \| PCI Loans
Business Acquisition [Line Items]
Book Balance	2,136
Fair Value	$ 1,465