Investment Securities - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	$ 94,415	$ 90,766
AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	76,894	83,095
AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	14,102	7,671
Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	419
BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	3,000
U.S. Treasury and U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	19,236	25,565
U.S. Treasury and U.S. government agencies | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	19,236	25,565
U.S. Treasury and U.S. government agencies | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0	0
U.S. Treasury and U.S. government agencies | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
U.S. Treasury and U.S. government agencies | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Mortgage-backed securities, residential
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	42,401	39,276
Mortgage-backed securities, residential | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	42,401	39,276
Mortgage-backed securities, residential | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0	0
Mortgage-backed securities, residential | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Mortgage-backed securities, residential | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Collateralized mortgage obligations, residential
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	9,677	14,590
Collateralized mortgage obligations, residential | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	9,677	14,590
Collateralized mortgage obligations, residential | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0	0
Collateralized mortgage obligations, residential | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Collateralized mortgage obligations, residential | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Mortgage-backed securities, multifamily
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	2,737	705
Mortgage-backed securities, multifamily | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	2,737	705
Mortgage-backed securities, multifamily | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0	0
Mortgage-backed securities, multifamily | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Mortgage-backed securities, multifamily | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	17,364	10,630
Obligations of states and political subdivisions | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	2,843	2,959
Obligations of states and political subdivisions | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	14,102	$ 7,671
Obligations of states and political subdivisions | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	419
Obligations of states and political subdivisions | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	3,000
Debt securities | AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Debt securities | AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Debt securities | Not Rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	0
Debt securities | BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total securities	$ 3,000