Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in 1 year or less	$ 5,245
Due after 1 year but within 5 years	40,345
Due after 5 years but within 10 years	28,447
Due after 10 years	2,862
Available-for-sale securities, amortized cost basis, Total	76,899
Amortized Cost	254,863	$ 262,342
Fair Value
Due in 1 year or less	5,141
Due after 1 year but within 5 years	38,504
Due after 5 years but within 10 years	24,115
Due after 10 years	2,314
Available-for-sale securities, fair value, Total	70,074
Available-for-sale securities, fair value	228,774	237,878
Amortized Cost
Due in 1 year or less	4,958
Due after 1 year but within 5 years	103,441
Due after 5 years but within 10 years	208,200
Due after 10 years	41,103
Held-to-maturity securities, amortized cost	357,702
Amortized Cost	404,831	399,494
Fair Value
Due in 1 year or less	4,913
Due after 1 year but within 5 years	97,579
Due after 5 years but within 10 years	178,786
Due after 10 years	33,761
Held-to-maturity securities, fair value	315,039
Held-to-maturity, Fair Value	355,789	$ 348,505
Mortgage-backed securities
Amortized Cost
Mortgage-backed securities	177,964
Fair Value
Mortgage-backed securities	158,700
Amortized Cost
Mortgage-backed securities	47,129
Fair Value
Mortgage-backed securities	$ 40,750