Securities (Held-to-maturity Securities, Debt Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in 1 year or less	$ 2,443
Due in 1 to 5 years	17,604
Due in 5 to 10 years	59,708
Due after 10 years	11,569
Total investment securities	91,324	$ 236,283
Estimated Fair Value
Due in 1 year or less	2,472
Due in 1 to 5 years	18,153
Due in 5 to 10 years	64,775
Due after 10 years	15,084
Total investment securities	$ 100,484	$ 245,341

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

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