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Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024
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Securities [Abstract] |  |  |
Amortized cost, within one year |  | $ 212,369 |
Fair value, within one year |  | 213,657 |
Amortized cost, after one year through five years |  | 27,914 |
Fair value, after one year through five years |  | 27,107 |
Amortized cost, after five years through ten years |  | 10,427 |
Fair value, after five years through ten years |  | 9,114 |
Amortized cost, after ten years |  | 0 |
Fair value, after ten years |  | 0 |
Amortized cost, total securities available-for-sale |  | 250,710 |
Fair value, total securities available-for-sale |  | 249,878 |
Amortized cost, mortgage-backed and asset-backed securities |  | 123,256 |
Fair value, mortgage-backed and asset-backed securities |  | 106,184 |
Amortized cost, total securities available-for-sale | [1] | 373,966 | $ 376,179
Fair value, total securities available-for-sale |  | 356,062 | 350,001
Securities held-to-maturity |  |  |
Amortized cost, within one year |  | 55,541 |
Fair value, within one year |  | 55,544 |
Amortized cost, after one year through five years |  | 163,832 |
Fair value, after one year through five years |  | 163,486 |
Amortized cost, after five years through ten years |  | 203,326 |
Fair value, after five years through ten years |  | 186,454 |
Amortized cost, after ten years |  | 85,409 |
Fair value, after ten years |  | 76,965 |
Amortized cost, total securities held-to-maturity |  | 508,108 |
Fair value, total securities held-to-maturity |  | 482,449 |
Amortized cost, mortgage-backed securities |  | 268,587 |
Fair value, mortgage-backed securities |  | 255,685 |
Amortized cost, total securities held-to-maturity | [2] | 776,695 | 690,837
Fair value, total securities held-to-maturity |  | 738,134 | $ 630,241
Amortized cost |  | 1,150,661 |
Estimated fair value |  | $ 1,094,196 |
[1] | Amortized cost excludes accrued interest receivable of $4.5 million and $4.0 million at June 30, 2025 and June 30, 2024, respectively, which is included in accrued interest receivable in the consolidated statements of financial condition.
[2] | Amortized cost excludes accrued interest receivable of $4.9 million and $4.1 million at June 30, 2025 and June 30, 2024, respectively, which is included in accrued interest receivable in the consolidated statements of financial condition.

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