Borrowed Funds - Additional Information (Details) - USD ($) $ in Millions			12 Months Ended
	Dec. 15, 2022	Sep. 20, 2022	Dec. 31, 2024	Dec. 31, 2021	Dec. 31, 2023	Jun. 30, 2021
Debt Instrument [Line Items]
Weighted average interest rate for short-term borrowings					5.62%
Subordinated notes, interest rate				3.00%
Fair value of securities			$ 3,000.0		$ 3,500.0
USAmeriBancorp, Inc.
Debt Instrument [Line Items]
Subordinated notes		$ 150.0
Subordinated notes, interest rate		6.25%
Subordinated debt initial term			5 years
Subordinated debt SOFR term			3 months
Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt basis points	2.36%	2.78%	5.14%
Subordinated debt initial term			5 years
Subordinated debt SOFR term			3 months
Subordinated Debt | USAmeriBancorp, Inc.
Debt Instrument [Line Items]
Subordinated debt initial term			5 years
FHLB
Debt Instrument [Line Items]
Weighted average interest rate for long-term borrowings			4.20%		3.75%
Subordinated Notes Due June 2025
Debt Instrument [Line Items]
Subordinated notes			$ 100.0
Subordinated notes, interest rate			4.55%
Net carrying value of subordinated debentures			$ 99.9		$ 99.8
Subordinated Notes Due June 2030
Debt Instrument [Line Items]
Subordinated notes			$ 115.0
Subordinated notes, interest rate			5.25%
Net carrying value of subordinated debentures			$ 114.0		113.8
Subordinated Notes Due June 2031
Debt Instrument [Line Items]
Subordinated notes			$ 300.0			$ 300.0
Subordinated notes, interest rate			3.00%
Net carrying value of subordinated debentures			$ 285.0		276.6
Subordinated Notes Due September 2032
Debt Instrument [Line Items]
Net carrying value of subordinated debentures			$ 148.6		$ 148.2