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Securities - Amortized Cost and Approximate Fair Value of Securities, Together with Gross Unrealized Gains and Losses of Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 231,672	$ 245,052
Gross Unrealized Gains	22	54
Gross Unrealized Losses	(30,395)	(24,200)
Fair Value	201,299	220,906
U.S. Treasury [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	497	3,483
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(59)	(83)
Fair Value	438	3,400
U.S. Government and Federal Agency and Government sponsored enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,976	9,488
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(499)	(367)
Fair Value	6,477	9,121
Mortgage-backed: GSE Residential [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	203,139	210,367
Gross Unrealized Gains	21	47
Gross Unrealized Losses	(27,434)	(22,229)
Fair Value	175,726	188,185
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,629	17,960
Gross Unrealized Gains	1	3
Gross Unrealized Losses	(2,397)	(1,521)
Fair Value	15,233	16,442
State and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,431	3,754
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(6)	0
Fair Value	$ 3,425	$ 3,758

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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