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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 | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | ---
Less than 12 Months, Fair Value | $ 7,506 | $ 16,728
Less than 12 Months, Unrealized Losses | (198) | (506)
12 Months or More, Fair Value | 185,506 | 178,090
12 Months or More, Unrealized Losses | (27,921) | (29,889)
Total, Fair Value | 193,012 | 194,818
Total, Unrealized Losses | (28,119) | (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 | 447 | 438
12 Months or More, Unrealized Losses | (49) | (59)
Total, Fair Value | 447 | 438
Total, Unrealized Losses | (49) | (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 | 6,584 | 6,477
12 Months or More, Unrealized Losses | (394) | (499)
Total, Fair Value | 6,584 | 6,477
Total, Unrealized Losses | (394) | (499)
Mortgage-backed: GSE residential [Member] |  |
Less than 12 Months, Fair Value | 6,268 | 14,517
Less than 12 Months, Unrealized Losses | (179) | (440)
12 Months or More, Fair Value | 162,826 | 158,413
12 Months or More, Unrealized Losses | (25,153) | (26,994)
Total, Fair Value | 169,092 | 172,930
Total, Unrealized Losses | (25,332) | (27,434)
Small Business Administration [Member] |  |
Less than 12 Months, Fair Value | 1,238 | 1,148
Less than 12 Months, Unrealized Losses | (19) | (60)
12 Months or More, Fair Value | 13,414 | 12,762
12 Months or More, Unrealized Losses | (2,246) | (2,337)
Total, Fair Value | 14,654 | 13,910
Total, Unrealized Losses | (2,265) | (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 | 2,235 | 0
12 Months or More, Unrealized Losses | (79) | 0
Total, Fair Value | 2,235 | 1,063
Total, Unrealized Losses | $ (79) | $ (6)

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