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2. Investment securities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized Cost
Due within one year	$ 6,679
Due from one to five years	54,189
Due from five to ten years	27,801
Due after ten years	24,332
Mortgage-backed securities	80,815
Trust preferred securities	250
Total	194,066	$ 191,013
Estimated Fair Value
Due within one year	6,770
Due from one to five years	56,595
Due from five to ten years	29,452
Due after ten years	24,371
Mortgage-backed securities	84,076
Trust preferred securities	250
Total	$ 201,514

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