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Securities - Association's Investments Gross Unrealized Investment Losses and Fair Value of Association's Investments with Unrealized Losses (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Less than 12 Months, Fair Value | $ 13,575 | $ 16,728
Less than 12 Months, Unrealized Losses | (493) | (506)
12 Months or More, Fair Value | 175,175 | 178,090
12 Months or More, Unrealized Losses | (37,042) | (29,889)
Total, Fair Value | 188,750 | 194,818
Total, Unrealized Losses | (37,535) | (30,395)
U.S. Treasury [Member] |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Losses | 0 | 0
12 Months or More, Fair Value | 430 | 438
12 Months or More, Unrealized Losses | (67) | (59)
Total, Fair Value | 430 | 438
Total, Unrealized Losses | (67) | (59)
U.S. Government and federal agency [Member] |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Losses | 0 | 0
12 Months or More, Fair Value | 6,427 | 6,477
12 Months or More, Unrealized Losses | (550) | (499)
Total, Fair Value | 6,427 | 6,477
Total, Unrealized Losses | (550) | (499)
Mortgage-backed: GSE residential [Member] |  |
Less than 12 Months, Fair Value | 12,377 | 14,517
Less than 12 Months, Unrealized Losses | (441) | (440)
12 Months or More, Fair Value | 154,201 | 158,413
12 Months or More, Unrealized Losses | (33,554) | (26,994)
Total, Fair Value | 166,578 | 172,930
Total, Unrealized Losses | (33,995) | (27,434)
Small Business Administration [Member] |  |
Less than 12 Months, Fair Value | 1,198 | 1,148
Less than 12 Months, Unrealized Losses | (52) | (60)
12 Months or More, Fair Value | 13,070 | 12,762
12 Months or More, Unrealized Losses | (2,854) | (2,337)
Total, Fair Value | 14,268 | 13,910
Total, Unrealized Losses | (2,906) | (2,397)
State and political subdivisions [Member] |  |
Less than 12 Months, Fair Value | 0 | 1,063
Less than 12 Months, Unrealized Losses | 0 | (6)
12 Months or More, Fair Value | 1,047 | 0
12 Months or More, Unrealized Losses | (17) | 0
Total, Fair Value | 1,047 | 1,063
Total, Unrealized Losses | $ (17) | $ (6)

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