v3.26.1

Investment and Equity Securities - Amortized Cost and Fair Value of Held to Maturity Securities Portfolio (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]
Due after one but within five years, Amortized Cost	$ 5,300
Due after five but within ten years, Amortized Cost	7,588
Due after ten years, Amortized cost	9,074
Total Securities held for maturity, Amortized Cost	21,962
Due after one but within five years, Estimated Fair Value	5,104
Due after five but within ten years, Estimated Fair Value	7,060
Due after ten years, Estimated Fair Value	7,833
Total Securities held for maturity, Estimated Fair Value	$ 19,997	$ 20,208
Due after one but within five years, Book Yield	7.82%
Due after five but within ten years, Book Yield	3.35%
Due after ten years, Book Yield	3.38%
Total Securities held for maturity, Book Yield	4.44%

Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth 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).

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Held to maturity securities after five but within ten years yield.

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Held to maturity securities after ten years yield.

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Held to maturity securities debt maturities after five through ten years amortized cost.

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Held to maturity securities debt maturities after one but within five years yield.

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Held to maturity securities debt maturities after one through five years amortized cost.

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Held to maturity securities debt maturities after ten years amortized cost.

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Held to maturity securities debt securities to yield.

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Held to maturity securities due after five years through ten years fair value.

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Held to maturity securities due after ten years fair value.

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