Securities - Amortized Cost and Estimated Fair Value of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Held-to-maturity debt securities:	$ 312,415	$ 312,401
Total held-to-maturity debt securities	312,415	312,401
Fair Value
Due after five years through ten years	265,102	267,455
Total held-to-maturity debt securities	$ 265,102	$ 267,455

Amount excluding accrued interest, 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, 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).

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Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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

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