Loans and Leases and the Allowance for Credit Losses - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Accrued interest receivable	$ 63,175		$ 61,002
Revolving loans, converted to term loan during the period	$ 2,100		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	$ 3,900
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 31, 2023
Accounting standards update [extensible enumeration]	ASU 2022-02
Amortized cost basis of loan modifications that subsequently defaulted	$ 0
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	$ 41,500		$ 40,100
Maximum
Accounts Notes And Loans Receivable [Line Items]
Net gains related to sales of residential mortgage loans	$ 100	$ 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