Business Combinations - Purchase Price (Details) $ / shares in Units, $ in Thousands	Jan. 31, 2023	Oct. 07, 2022 USD ($) $ / shares shares	Jan. 03, 2022 USD ($) $ / shares shares	Aug. 06, 2021 USD ($) $ / shares shares
Apollo Bancshares, Inc.
Business Acquisition [Line Items]
Number of shares outstanding (in shares) | shares		3,766,000
Exchange ratio (in shares)		1.006529
Number of shares of SBCF common stock issues (in shares) | shares		3,791,000
Number of minority interest shares outstanding (in shares) | shares		609,000
Per share exchange ratio (in shares)		1.195651
Number of shares of SBCF common stock issued, minority interest converted (in shares) | shares		728,000
Number of shares of common stock issued (in shares) | shares		4,519,000
Multiplied by common stock price per share (in dollars per share) | $ / shares		$ 30.83
Value of common stock issued		$ 139,307
Cash paid for fractional shares		5
Fair value of options and warrants converted		6,530
Total purchase price		$ 145,842
Drummond Banking Company
Business Acquisition [Line Items]
Number of shares outstanding (in shares) | shares		99,000
Exchange ratio (in shares)		51.9561
Number of shares of common stock issued (in shares) | shares		5,136,000
Multiplied by common stock price per share (in dollars per share) | $ / shares		$ 30.83
Total purchase price		$ 158,332
Business Bank of Florida
Business Acquisition [Line Items]
Number of shares outstanding (in shares) | shares			1,112,000
Exchange ratio (in shares)			0.7997
Number of shares of common stock issued (in shares) | shares			889,000
Multiplied by common stock price per share (in dollars per share) | $ / shares			$ 35.39
Value of common stock issued			$ 31,480
Fair value of options and warrants converted			497
Total purchase price			$ 31,977
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Number of shares outstanding (in shares) | shares			7,536,000
Exchange ratio (in shares)			0.2203
Number of shares of common stock issued (in shares) | shares			1,660,000
Multiplied by common stock price per share (in dollars per share) | $ / shares			$ 35.39
Value of common stock issued			$ 58,762
Fair value of options and warrants converted			3,336
Total purchase price			$ 62,098
Legacy Bank of Florida
Business Acquisition [Line Items]
Number of shares outstanding (in shares) | shares				15,778,000
Exchange ratio (in shares)				0.1703
Number of shares of common stock issued (in shares) | shares				2,687,000
Multiplied by common stock price per share (in dollars per share) | $ / shares				$ 32.19
Value of common stock issued				$ 86,487
Cash paid for fractional shares				7
Fair value of options and warrants converted				4,736
Total purchase price				$ 91,230
Professional Holding Corp. | Subsequent Event
Business Acquisition [Line Items]
Exchange ratio (in shares)	0.8909