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Securities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |
Mortgage-backed securities with a book value | $ 154,486 |  | $ 155,588
Fair Value | $ 161,292 |  | 162,394
Percentage of equity securities | 10.00% |  |
Carrying value of securities pledged as collateral | $ 73,908 |  | 66,186
Repurchase agreements | 4,383 |  | 3,738
Gross gains from sales of available for sale securities | 204 | $ 1 |
Gross losses from sales of available for sale securities | 0 | 0 |
Tax benefit to net realized gains (losses) | 58 | $ 0 |
Investments in debt and marketable equity securities | $ 27,195 |  | $ 24,574
Temporarily impaired debt securities percentage of investment securities portfolio | 17.00% |  | 16.00%
Maturity Overnight [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Repurchase agreements | $ 2,700 |  |
Maturity 30 to 90 Days [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Repurchase agreements | 1,700 |  |
Mortgage-backed Securities - GSE Residential [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Mortgage-backed securities with a book value | 142,008 |  | $ 143,033
Fair Value | 147,954 |  | 148,855
Investments in debt and marketable equity securities | 27,134 |  | 24,513
Debt Securities [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investments in debt and marketable equity securities | $ 27,195 |  | $ 24,574

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