Fair Value Disclosures - Additional Information (Detail)		12 Months Ended
	Dec. 01, 2021 USD ($)	Dec. 31, 2022 USD ($) Investment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Servicing rights carrying amount before valuation allowance		$ 8,600,000	$ 7,900,000
Servicing rights valuation allowance		5,000	13,000
Goodwill impairment		0	0	$ 0
Impairments to identifiable intangible assets		0	0	0
Other real estate owned		19,300,000	279,000
Transfer of loans to other real estate owned		$ 18,325,000	126,000	$ 8,405,000
Number of properties transferred | Investment		1
Not Designated as Hedging Instrument [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount		$ 841,044,000	844,974,000
Credit Risk Contract [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount		815,469,000	755,576,000
Contingent Consideration Liability [Member] | Fair Value Measured on Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 1,600,000	1,765,000	1,629,000
Paul I. Sheaffer Insurance Agency [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Original potential cash payments from contingent consideration, minimum	0
Original potential cash payments from contingent consideration, maximum	$ 1,900,000
Potential cash payments from contingent consideration, period of measurement (in years)	3 years
Potential cash payments from contingent consideration, end date	Nov. 30, 2024
Held for Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of impaired loans held for investment		13,400,000	33,100,000
Valuation allowance of impaired loans held for investment		2,800,000	$ 11,000
Lease Financings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of impaired loans held for investment		$ 0