Business Combination and Asset Purchase - Summary of Consideration Paid and Amounts of Assets Acquired and Liabilities Assumed Recognized (Detail) - USD ($) $ in Thousands	Oct. 01, 2021	Apr. 30, 2021	Sep. 30, 2022	Dec. 31, 2021
Assets
Goodwill			$ 80,434	$ 80,434
Perpetual Federal Savings Bank [Member]
Business Acquisition [Line Items]
Cash	$ 59,234
Common Shares	41,078
Total	100,312
Assets
Cash and cash equivalents	44,975
Federal funds sold	1,672
Interest-bearing time deposits	6,250
Other securities, at cost	2,794
Loans, net	334,661
Premises and equipment	615
Goodwill	25,220
Other assets	3,975
Total Assets Purchased	420,162
Deposits
Noninterest bearing	2,018
Interest bearing	309,090
Total deposits	311,108
Federal Home Loan Bank (FHLB) advances	6,218
Accrued expenses and other liabilities	2,524
Total Liabilities Assumed	$ 319,850
Ossian Financial Services, Inc. [Member]
Business Acquisition [Line Items]
Cash		$ 20,001
Total		20,001
Assets
Cash and cash equivalents		20,229
Interest-bearing time deposits		20,226
Securities - available-for-sale		30,243
Other securities, at cost		281
Loans, net		52,403
Premises and equipment		494
Goodwill		7,874
Other assets		5,308
Total Assets Purchased		137,058
Deposits
Noninterest bearing		34,509
Interest bearing		81,535
Total deposits		116,044
Accrued expenses and other liabilities		1,013
Total Liabilities Assumed		$ 117,057