Commitments and Credit Risk (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Standby Letters of Credit
Other Commitments [Line Items]
Outstanding letters of credit	$ 44,400,000	$ 37,700,000
Deferred revenue	0	0
Federal Home Loan Bank Certificates and Obligations (FHLB)
Other Commitments [Line Items]
Outstanding letters of credit	$ 265,700,000	$ 59,100,000
Term of debt instrument (less than)	1 year	1 year
Minimum | Standby Letters of Credit
Other Commitments [Line Items]
Term of letter of credit	9 months	9 months
Maximum | Standby Letters of Credit
Other Commitments [Line Items]
Term of letter of credit	15 years	15 years
Credit Card Commitments
Other Commitments [Line Items]
Outstanding commitments	$ 696,700,000	$ 685,300,000
Other Loan Commitments
Other Commitments [Line Items]
Outstanding commitments	5,640,000,000	3,410,000,000
Fixed Rate Mortgage Loans
Other Commitments [Line Items]
Outstanding commitments	$ 21,100,000	$ 108,500,000