Fair Value Measurements - Recurring Assets (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Mortgage-backed securities
Fair Value Measurements [Abstract]
Total assets, fair value	$ 4,999	$ 4,966
State and political securities
Fair Value Measurements [Abstract]
Total assets, fair value	92,040	82,286
Other debt securities
Fair Value Measurements [Abstract]
Total assets, fair value	58,483	61,367
Other equity securities - Available for sales
Fair Value Measurements [Abstract]
Total assets, fair value	1,281	1,261
Other equity securities - Trading
Fair Value Measurements [Abstract]
Total assets, fair value	37	51
Level I | Mortgage-backed securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level I | State and political securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level I | Other debt securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level I | Other equity securities - Available for sales
Fair Value Measurements [Abstract]
Total assets, fair value	1,281	1,261
Level I | Other equity securities - Trading
Fair Value Measurements [Abstract]
Total assets, fair value	37	51
Level II | Mortgage-backed securities
Fair Value Measurements [Abstract]
Total assets, fair value	4,999	4,966
Level II | State and political securities
Fair Value Measurements [Abstract]
Total assets, fair value	92,040	82,286
Level II | Other debt securities
Fair Value Measurements [Abstract]
Total assets, fair value	58,483	61,367
Level II | Other equity securities - Available for sales
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level II | Other equity securities - Trading
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level III | Mortgage-backed securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level III | State and political securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level III | Other debt securities
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level III | Other equity securities - Available for sales
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Level III | Other equity securities - Trading
Fair Value Measurements [Abstract]
Total assets, fair value	$ 0	$ 0