Allowance for Credit Losses - Summary of Allowance for Credit Losses by Loan Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ 10,228	$ 4,666
Charge-offs	0	0
Recoveries	12	111
Provision for credit losses	(276)	(468)
Ending balance	9,964	9,964
ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		5,655
Agriculture and Farmland [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	209	279
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(130)	(10)
Ending balance	79	79
Agriculture and Farmland [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		(190)
Construction [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	728	274
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(275)	(334)
Ending balance	453	453
Construction [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		513
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	729	583
Charge-offs	0	0
Recoveries	0	1
Provision for credit losses	126	(12)
Ending balance	855	855
Commercial and Industrial [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		283
Multifamily [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	673	480
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(254)	(401)
Ending balance	419	419
Multifamily [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		340
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	1,559	635
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	197	361
Ending balance	1,756	1,756
Owner Occupied [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		760
Non-owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	4,350	1,116
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(220)	(181)
Ending balance	4,130	4,130
Non-owner Occupied [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		3,195
First Liens [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	1,397	1,029
Charge-offs	0	0
Recoveries	11	50
Provision for credit losses	44	(262)
Ending balance	1,452	1,452
First Liens [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		635
Second Liens and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	383	218
Charge-offs	0	0
Recoveries	1	60
Provision for credit losses	(58)	(92)
Ending balance	326	326
Second Liens and Lines of Credit [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		140
Municipal [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	7	12
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	0	(3)
Ending balance	7	7
Municipal [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		(2)
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	22	40
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	2	3
Ending balance	24	24
Consumer [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		(19)
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	171	0
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	292	463
Ending balance	$ 463	463
Unallocated [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adopting ASC 326		$ 0