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Securities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Mortgage-backed securities with a book value | $ 231,125 |  | $ 231,125 |  | $ 186,589
Fair Value | $ 218,639 |  | $ 218,639 |  | 189,891
Percentage of equity securities | 10.00% |  | 10.00% |  |
Repurchase agreements | $ 7,263 |  | $ 7,263 |  | 6,245
Gross gains from sales of available for sale securities |  |  | 0 | $ 327 |
Gross losses from sales of available for sale securities |  |  | 0 | 7 |
Tax benefit to net realized gains (losses) | 0 | $ 33 | 0 | $ 91 |
Investments in debt and marketable equity securities | $ 179,350 |  | $ 179,350 |  | $ 85,118
Temporarily impaired debt securities percentage of investment securities portfolio | 82.00% |  | 82.00% |  | 45.00%
Asset Pledged as Collateral with Right [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure | $ 116,110 |  | $ 116,110 |  | $ 96,429
Maturity Overnight [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Repurchase agreements | 7,300 |  | 7,300 |  |
US Treasury Securities [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Mortgage-backed securities with a book value | 8,804 |  | 8,804 |  | 990
Fair Value | 8,688 |  | 8,688 |  | 996
Investments in debt and marketable equity securities | 7,694 |  | 7,694 |  |
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Mortgage-backed securities with a book value | 9,489 |  | 9,489 |  | 7,522
Fair Value | 9,395 |  | 9,395 |  | 8,039
Investments in debt and marketable equity securities | 3,324 |  | 3,324 |  |
Mortgage-backed Securities - GSE Residential [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Mortgage-backed securities with a book value | 196,180 |  | 196,180 |  | 167,711
Fair Value | 184,751 |  | 184,751 |  | 170,415
Investments in debt and marketable equity securities | 153,637 |  | 153,637 |  | 79,162
Debt Securities [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Investments in debt and marketable equity securities | 179,350 |  | 179,350 |  | 85,118
Small Business Administration [Member] |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Mortgage-backed securities with a book value | 15,542 |  | 15,542 |  | 9,115
Fair Value | 14,695 |  | 14,695 |  | $ 9,190
Investments in debt and marketable equity securities | $ 14,695 |  | $ 14,695 |  |

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