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Securities - Schedule of Fair Values and Gross Unrealized and Unrecognized Losses on Investments (Detail) $ in Thousands | Dec. 31, 2022 USD ($) Security | Jun. 30, 2022 USD ($) Security
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Securities Available-for-sale |  |
Less than 12 Months: Fair Value | $ 547,510 | $ 847,082
Less than 12 Months: Unrealized Losses | 23,432 | 46,005
12 Months or More: Fair Value | 717,632 | 456,929
12 Months or More: Unrealized Losses | $ 127,451 | $ 72,286
Total: Number of Securities | Security | 190 | 229
Total: Fair Value | $ 1,265,142 | $ 1,304,011
Total: Unrealized Losses | 150,883 | 118,291
Securities Held to Maturity |  |
Less than 12 Months: Fair value | 111,125 | 95,674
Less than 12 Months: Unrecognized Losses | 9,377 | 10,217
12 Months or More: Fair Value | 26,804 | 0
12 Months or More: Unrecognized Losses | $ 6,016 | $ 0
Total: Number of Securities | Security | 46 | 24
Fair Value: Total | $ 137,929 | $ 95,674
Total: Unrecognized Losses | 15,393 | 10,217
Obligations of state and political subdivisions |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value |  | 11,310
Less than 12 Months: Unrealized Losses |  | 89
12 Months or More: Fair Value |  | 0
12 Months or More: Unrealized Losses |  | $ 0
Total: Number of Securities | Security |  | 30
Total: Fair Value |  | $ 11,310
Total: Unrealized Losses |  | 89
Securities Held to Maturity |  |
Less than 12 Months: Fair value | 18,057 | 8,681
Less than 12 Months: Unrecognized Losses | 285 | 78
12 Months or More: Fair Value | 0 | 0
12 Months or More: Unrecognized Losses | $ 0 | $ 0
Total: Number of Securities | Security | 36 | 15
Fair Value: Total | $ 18,057 | $ 8,681
Total: Unrecognized Losses | 285 | 78
Asset-backed securities |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value | 137,203 | 161,303
Less than 12 Months: Unrealized Losses | 2,406 | 2,928
12 Months or More: Fair Value | 21,420 | 5,254
12 Months or More: Unrealized Losses | $ 480 | $ 21
Total: Number of Securities | Security | 15 | 15
Total: Fair Value | $ 158,623 | $ 166,557
Total: Unrealized Losses | 2,886 | 2,949
Collateralized loan obligations |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value | 177,907 | 236,967
Less than 12 Months: Unrealized Losses | 3,631 | 6,435
12 Months or More: Fair Value | 192,556 | 70,846
12 Months or More: Unrealized Losses | $ 5,368 | $ 1,445
Total: Number of Securities | Security | 28 | 24
Total: Fair Value | $ 370,463 | $ 307,813
Total: Unrealized Losses | 8,999 | 7,880
Corporate bonds |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value | 87,731 | 129,407
Less than 12 Months: Unrealized Losses | 7,972 | 6,464
12 Months or More: Fair Value | 50,356 | 3,815
12 Months or More: Unrealized Losses | $ 6,845 | $ 185
Total: Number of Securities | Security | 29 | 27
Total: Fair Value | $ 138,087 | $ 133,222
Total: Unrealized Losses | 14,817 | 6,649
Collateralized mortgage obligations |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value |  | 7,122
Less than 12 Months: Unrealized Losses |  | 329
12 Months or More: Fair Value |  | 0
12 Months or More: Unrealized Losses |  | $ 0
Total: Number of Securities | Security |  | 6
Total: Fair Value |  | $ 7,122
Total: Unrealized Losses |  | 329
Commercial pass-through securities |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value | 93,772 | 63,045
Less than 12 Months: Unrealized Losses | 4,262 | 3,194
12 Months or More: Fair Value | 54,789 | 102,817
12 Months or More: Unrealized Losses | $ 12,773 | $ 16,577
Total: Number of Securities | Security | 12 | 21
Total: Fair Value | $ 148,561 | $ 165,862
Total: Unrealized Losses | 17,035 | 19,771
Securities Held to Maturity |  |
Less than 12 Months: Fair value | 0 | 10,729
Less than 12 Months: Unrecognized Losses | 0 | 1,552
12 Months or More: Fair Value | 10,055 | 0
12 Months or More: Unrecognized Losses | $ 2,210 | $ 0
Total: Number of Securities | Security | 1 | 1
Fair Value: Total | $ 10,055 | $ 10,729
Total: Unrecognized Losses | 2,210 | 1,552
Residential pass-through securities |  |
Securities Available-for-sale |  |
Less than 12 Months: Fair Value | 50,897 | 237,928
Less than 12 Months: Unrealized Losses | 5,161 | 26,566
12 Months or More: Fair Value | 398,511 | 274,197
12 Months or More: Unrealized Losses | $ 101,985 | $ 54,058
Total: Number of Securities | Security | 106 | 106
Total: Fair Value | $ 449,408 | $ 512,125
Total: Unrealized Losses | 107,146 | 80,624
Securities Held to Maturity |  |
Less than 12 Months: Fair value | 93,068 | 76,264
Less than 12 Months: Unrecognized Losses | 9,092 | 8,587
12 Months or More: Fair Value | 16,749 | 0
12 Months or More: Unrecognized Losses | $ 3,806 | $ 0
Total: Number of Securities | Security | 9 | 8
Fair Value: Total | $ 109,817 | $ 76,264
Total: Unrecognized Losses | $ 12,898 | $ 8,587

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