Basis of Presentation - Additional Information (Details) $ in Millions	Jan. 01, 2018 USD ($)
Accounting Policies [Abstract]
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