Business Combination and Asset Purchase - Summary of Changes in Accretable Yield or Income Expected to be Collected (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Peoples Federal Savings and Loan [Member]
Business Acquisition [Line Items]
Beginning Balance	$ 46	$ 277	$ 104	$ 335
Accretion	(46)	(58)	(104)	(116)
Ending Balance	0	219	0	219
Perpetual Federal Savings Bank in 2021 and 2022 [Member]
Business Acquisition [Line Items]
Beginning Balance	0	1,117	112	1,453
Accretion	0	(335)	(112)	(671)
Ending Balance	0	782	0	782
Ossian Financial Services, Inc. [Member]
Business Acquisition [Line Items]
Beginning Balance	0	67	0	107
Accretion	0	(39)	0	(79)
Ending Balance	$ 0	$ 27	$ 0	$ 27

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details