Business Combinations - Purchase Price (Details) $ / shares in Units, $ in Thousands	Oct. 07, 2022 USD ($) $ / shares shares	Jan. 03, 2022 USD ($) $ / shares shares	Aug. 06, 2021 USD ($) $ / shares shares
Business Bank of Florida
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares		1,112,000
Per share 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 converted		497
Total purchase price		$ 31,977
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares		7,536,000
Per share 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 converted		3,336
Total purchase price		$ 62,098
Legacy Bank of Florida
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares			15,778,000
Per share 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 converted			4,736
Total purchase price			$ 91,230
Apollo Bancshares, Inc. | Subsequent Event
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares	3,766,412
Per share exchange ratio (in shares)	1.006529
Number of shares of SBCF common stock issues (in shares) | shares	3,790,848
Number of minority interest shares outstanding (in shares) | shares	608,635
Per share exchange ratio (in shares)	1.195651
Number of shares of SBCF common stock issued, minority interest converted (in shares) | shares	727,714
Number of shares of common stock issued (in shares) | shares	4,518,562
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 converted	6,530
Total purchase price	$ 145,842
Drummond Banking Company | Subsequent Event
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares	98,846
Per share exchange ratio (in shares)	51.9561
Number of shares of common stock issued (in shares) | shares	5,135,631
Multiplied by common stock price per share (in dollars per share) | $ / shares	$ 30.83
Total purchase price	$ 158,332