Investment Securities - Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Available for Sale Amortized Cost
Due within one year	$ 453
Due over one to five years	2,042
Due over five to ten years	11,565
Due over ten years	122,716
Amortized Cost	136,776	$ 112,354
Available for Sale Fair Value
Due within one year	456
Due over one to five years	2,074
Due over five to ten years	11,603
Due over ten years	120,764
Fair Value	$ 134,897	$ 114,049
Available for Sale, Yield
Within one year	2.00%
Over one to five years	1.99%
Over five to ten years	1.30%
Over ten years	1.96%