Commitments and Contingent Liabilities (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 03, 2024 item
Commitments to extend credit and standby letters of credit | $	$ 9,500.0
Liability recorded for expected credit losses on unfunded commitments | $	53.2
Period for special assessment		2 years
FDIC special assessment additional expense | $	3.9
FDIC special assessment | $	$ 29.5	$ 25.7
Cases Pending In US District Court | Florida
Number of pending or threatened litigation | item			9
Cases Pending In US District Court | South Carolina
Number of pending or threatened litigation | item			1
Cases Pending In US District Court | Georgia
Number of pending or threatened litigation | item			1
Cases Pending In Circuit Court | Florida
Number of pending or threatened litigation | item			1