Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands	Dec. 31, 2022 USD ($) Collateral	Dec. 31, 2021 USD ($) Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 18,475	$ 7,632
Business Assets	5,066	5,650
Other	$ 289	$ 208
Number of Loans Dependent on Collateral | Collateral	28	39
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 17,935	$ 6,001
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral	4	6
Construction [Member]
Financing Receivable, Modifications [Line Items]
Real Estate		$ 0
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral		0
Small Business Administration Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 151	$ 405
Business Assets	292	517
Other		$ 112
Number of Loans Dependent on Collateral | Collateral	6	10
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Modifications [Line Items]
Real Estate		$ 0
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral		0
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 87	$ 688
Business Assets	2,774	5,133
Other	$ 81	$ 96
Number of Loans Dependent on Collateral | Collateral	13	19
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 269	$ 0
Business Assets	2,000	0
Other	$ 208	$ 0
Number of Loans Dependent on Collateral | Collateral	4	0
Municipal Lease Finance Receivables [Member]
Financing Receivable, Modifications [Line Items]
Real Estate		$ 0
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral		0
SFR mortgage [Member]
Financing Receivable, Modifications [Line Items]
Real Estate		$ 380
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral		2
Consumer And Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 33	$ 158
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral	1	2