Loans and Leases and the Allowance for Credit Losses - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Net gains (loss) related to sales of residential mortgage loans	$ (200)	$ 200	$ 300	$ 200
Accrued interest receivable	64,720		64,720		$ 61,002
Revolving loans, converted to term loan during the period			$ 5,300		6,200
Number of days non-accrual loans are not past due			30 days
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure	5,400		$ 5,400
Pass | Residential Mortgage
Accounts Notes And Loans Receivable [Line Items]
Number of days past due for loans and leases in classified credit quality indicator			90 days
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)			60.00%
Pass | Home Equity
Accounts Notes And Loans Receivable [Line Items]
Number of days past due for loans and leases in classified credit quality indicator			90 days
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)			60.00%
Maximum current combined loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)			60.00%
Accrued Interest Receivable
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 42,900		$ 42,900		$ 40,100
Consumer | Classified
Accounts Notes And Loans Receivable [Line Items]
Number of days past due for loans and leases in classified credit quality indicator			90 days