Loans and Allowance for Credit Losses for Loans - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non covered loans net of unearned discount and deferred loan fees	$ 21,500,000		$ 21,500,000		$ 45,300,000
Accrued interest	206,200,000		206,200,000		208,900,000
Transfer of loans to loans held for sale, net			10,200,000	$ 34,143,000		$ 10,000,000.0
Allowance for credit loss, write-off			638,000		1,200,000	$ 4,200,000
Sales of loans	0	$ 0	0	0
Proceeds from sale of commercial premium finance lending division			0	98,060,000
Other real estate owned	$ 4,800,000		$ 4,800,000		$ 12,200,000
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable		Accrued interest receivable		Accrued interest receivable
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Commercial Premium Finance Lending Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of commercial premium finance lending division				96,800,000
Disposal group, discontinued operation, assets		95,500,000		95,500,000
Sale of loans held for investment, loan amount				93,600,000
Disposal group, including discontinued operation, liabilities		$ 2,800,000		2,800,000
Gain (loss) on disposition of business				$ 3,600,000
In formal foreclosure proceedings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential mortgage and consumer loans secured by residential real estate properties	$ 3,700,000		$ 3,700,000		$ 4,600,000