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Loans Held for Investment and Allowance for Credit Losses on Loans - Purchased Credit Deteriorated Loans (Detail) - Loans Acquired with Deteriorated Credit Quality [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items] |
Purchase price of loans at acquisition | $ 668
Allowance for credit losses at acquisition | 71
Par value of acquired loans at acquisition | $ 739

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