Investment Securities (Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Available-for-Sale Securities:
Available-for-sale securities, Amortized Cost, Within one year	$ 9,084
Available-for-sale securities, Fair Value, Within one year	9,144
Available-for-sale securities, Amortized Cost, After 1 through 5 years	66,698
Available-for-sale securities, Fair Value, After 1 through 5 years	68,040
Available-for-sale securities, Amortized Cost, After 5 through 10 years	267,448
Available-for-sale securities, Fair Value, After 5 through 10 years	268,203
Available-for-sale securities, Amortized Cost, After 10 years	147,883
Available-for-sale securities, Fair Value, After 10 years	152,586
Available-for-sale securities, Amortized Cost, Mortgage-backed securities	196,518
Available-for-sale securities, Fair Value, Mortgage-backed securities	199,571
Available-for-sale securities, Amortized Cost	687,631
Available-for-sale securities, Fair Value	$ 697,544	$ 758,015

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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