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Investment securities - Maturity Distribution of Debt Securities Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investment securities
Within one year	$ 15,601
After one but within five years	168,324
After five but within ten years	72,917
After ten years	84,933
Available for sale securities	341,775
Mortgage-backed and other amortizing securities	135,928
Total	$ 477,703	$ 517,321

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- Definition

Fair value 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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