Investment Securities - Contractual Maturities of Debt Securities Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year	$ 1,353
Due after one year through five years	290,800
Due after five years through ten years	172,949
Due after ten years	286,230
Residential mortgage-backed securities	870,356
Amortized Cost	1,621,688	$ 1,454,439
Fair Value
Due in one year	1,346
Due after one year through five years	277,194
Due after five years through ten years	150,980
Due after ten years	236,671
Residential mortgage-backed securities	783,143
Total	$ 1,449,334	$ 1,296,576

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).

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-Topic 320
-SubTopic 10
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-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

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+ References

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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 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).

+ References

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