Loans - Modified Loans (Details) $ in Thousands	3 Months Ended
Mar. 31, 2018 USD ($) Number	Mar. 31, 2017 USD ($) Number
Number of Contracts \| Number	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 52
Post-Modification Outstanding Recorded Investment	0	46
Specific Reserve Recorded	0	0
Valuation Allowance Recorded	$ 0	$ 6
Construction and land development [Member]
Number of Contracts \| Number		1
Pre-Modification Outstanding Recorded Investment		$ 52
Post-Modification Outstanding Recorded Investment		46
Specific Reserve Recorded		0
Valuation Allowance Recorded		$ 6

Financing receivable modified specifie reserve recorded trouble debt restructuring.

No definition available.

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Period Type:	duration

- Definition

Financing receivable modified valuation allowance recorded trouble debt restructuring.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbcf_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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- Details

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