Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ (11,300,000)	$ 34,400,000	$ 6,700,000
Commitments outstanding on troubled debt restructurings	0	0	500,000
Recorded investment in troubled debt restructurings that subsequently defaulted within twelve months	0	36,000	348,000
Reserve for unfunded commitments	1,403,000	1,887,000	1,159,000	$ 1,239,000
Acquired Impaired Loans
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	(3,300,000)	3,700,000	41,000
Individually Evaluated For Impairment
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	(2,900,000)	13,300,000	4,000,000.0
Collectively Evaluated For Impairment
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ 5,100,000	$ 17,500,000	$ 2,700,000