Business Combinations - Schedule of Business Acquisitions (Details) - Heartland Bancshares, Inc - Subsequent Event $ / shares in Units, shares in Thousands, $ in Thousands	Jul. 11, 2025 USD ($) $ / shares shares
Business Combination [Line Items]
Number of Heartland shares outstanding at closing (in shares) | shares	756
Per share exchange ratio for Heartland shares receiving stock	4.9263
Number of shares of SBCF common stock issued (in shares) | shares	1,862
SBCF price per share (in dollars per share) | $ / shares	$ 29.29
Value of SBCF common stock issued	$ 54,547
Per share cash consideration for shares receiving cash (in dollars per share) | $ / shares	$ 147.10
Cash consideration paid to Heartland shareholders, including cash paid for fractional shares	$ 55,622
Cash paid to Heartland option holders	1,054
Total purchase price	$ 111,224