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Investment Securities and Other Investments - Summary of Investments Classified by Contractual Maturity Date (Detail) $ in Thousands	Sep. 30, 2025 USD ($)
Schedule of Investments [Abstract]
Debt Securities Available for Sale, Amortized Cost, Due in one year or less	$ 9,890
Debt Securities Available for Sale, Amortized Cost, Due after one year through five years	60,979
Debt Securities Available for Sale, Amortized Cost, Due after five years through ten years	95,584
Debt Securities Available for Sale, Amortized Cost, Due after ten years	215,999
Total	382,452
Debt Securities Available for Sale, Fair Value, Due in one year or less	9,721
Debt Securities Available for Sale, Fair Value, Due after one year through five years	57,503
Debt Securities Available for Sale, Fair Value, Due after five years through ten years	85,934
Debt Securities Available for Sale, Fair Value, Due after ten years	188,196
Total	$ 341,354

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

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