Held to Maturity Debt Securities - Securities Held to Maturity by Contractual Maturity (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, amortized cost	$ 9,589
Due after one year through five years, amortized cost	105,715
Due after five years through ten years, amortized cost	249,399
Due after ten years, amortized cost	88,808
Total Amortized cost	453,511
Due in one year or less, fair value	9,605
Due after one year through five years, fair value	107,873
Due after five years through ten years, fair value	257,856
Due after ten years, fair value	92,510
Total Fair value	$ 467,844

Held-to-Maturity Securities, Fair Value, Excluding Mortgage-Backed Securities

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Held-to-maturity Securities, Excluding Mortgage-Backed Securities

+ References

No definition available.

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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 sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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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 next fiscal year through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next fiscal year through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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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 after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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