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Loans - Additional Information (Detail)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) Loan	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Jun. 30, 2021 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total Loans		$ 2,064,221,000	$ 1,997,879,000
Net deferred loan fees		1,735,000	2,924,000
Loans processed		0			$ 0
Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Net deferred loan fees		160,000	$ 1,762,000
Number of loans processed | Loan			3,600	3,600
Loans processed			$ 399,400,000	$ 399,400,000
Loans forgiven or paid off		395,700,000
Loans recognized fees in income		1,600,000
Unearned fees remain		160,000
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans		226,540,000	246,502,000
Number of loans processed | Loan	813
Loans processed	$ 431,300,000
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans		$ 3,710,000	$ 43,209,000

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