Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized Cost
Due in 1 year or less	$ 250
Due after 1 year but within 5 years	42,815
Due after 5 years but within 10 years	30,444
Due after 10 years	2,865
Available-for-sale securities, amortized cost basis, Total	76,374
Amortized Cost	258,570	$ 262,342
Fair Value
Due in 1 year or less	250
Due after 1 year but within 5 years	41,209
Due after 5 years but within 10 years	27,141
Due after 10 years	2,405
Available-for-sale securities, fair value, Total	71,005
Available-for-sale securities, fair value	236,609	237,878
Amortized Cost
Due in 1 year or less	3,339
Due after 1 year but within 5 years	92,148
Due after 5 years but within 10 years	210,891
Due after 10 years	41,356
Held-to-maturity securities, amortized cost	347,734
Amortized Cost	396,784	399,494
Fair Value
Due in 1 year or less	3,322
Due after 1 year but within 5 years	87,515
Due after 5 years but within 10 years	183,926
Due after 10 years	34,702
Held-to-maturity securities, fair value	309,465
Held-to-maturity, Fair Value	352,454	$ 348,505
Mortgage-backed securities
Amortized Cost
Mortgage-backed securities	182,196
Fair Value
Mortgage-backed securities	165,604
Amortized Cost
Mortgage-backed securities	49,050
Fair Value
Mortgage-backed securities	$ 42,989