Basis of Presentation - Additional Information (Details) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($)
Reclassification of accumulated unrealized loss	$ 0.1

The amount of Reclassification of accumulated unrealized loss

No definition available.

Name:	sbcf_ReclassificationOfAccumulatedUnrealizedLoss
Namespace Prefix:	sbcf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration