Borrowed Funds - Additional Information (Details) - USD ($)				12 Months Ended
	Dec. 15, 2022	Sep. 20, 2022	May 28, 2021	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Weighted average interest rate for short-term borrowings				5.62%	1.60%
FHLB advances callable for early redemption				$ 0
Subordinated notes, interest rate			3.00%
Fair value of securities				$ 3,500,000,000	$ 1,100,000,000
USAmeriBancorp, Inc.
Debt Instrument [Line Items]
Subordinated notes		$ 150,000,000
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 initial term				5 years
Subordinated debt SOFR term				3 months
Subordinated Debt | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Subordinated debt basis points	2.36%	2.78%		5.14%
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				3.75%	1.88%
Subordinated Notes Due September 2023
Debt Instrument [Line Items]
Subordinated notes				$ 125,000,000
Subordinated notes, interest rate				5.125%
Subordinated Notes Due June 2025
Debt Instrument [Line Items]
Subordinated notes				$ 100,000,000
Subordinated notes, interest rate				4.55%
Net carrying value of subordinated debentures				$ 99,900,000	$ 99,700,000
Subordinated Notes Due June 2030
Debt Instrument [Line Items]
Subordinated notes				$ 115,000,000
Subordinated notes, interest rate				5.25%
Net carrying value of subordinated debentures		$ 148,100,000		$ 113,800,000	113,600,000
Subordinated Notes Due June 2031
Debt Instrument [Line Items]
Subordinated notes				$ 300,000,000		$ 300,000,000
Subordinated notes, interest rate				3.00%
Net carrying value of subordinated debentures				$ 276,600,000	$ 267,100,000