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Business Combination & Asset Purchase - Summary of Consideration Paid and Amounts of Assets Acquired and Liabilities Assumed Recognized (Parenthetical) (Detail) - Perpetual Federal Savings Bank [Member] - shares | Oct. 01, 2022 | Oct. 01, 2021
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Business Acquisition [Line Items] |  |
Common stock issued in exchange of each outstanding share | 500,426 | 1,833,845
Treasury stock repurchased | 125 |

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