Fair Value Measurements - Non-Recurring Assets (Details) - Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Impaired loans
Fair Value Measurements [Abstract]
Total assets, fair value	$ 12,910	$ 15,854
Impaired loans | Level I
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Impaired loans | Level II
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Impaired loans | Level III
Fair Value Measurements [Abstract]
Total assets, fair value	12,910	15,854
Other real estate owned
Fair Value Measurements [Abstract]
Total assets, fair value	376	413
Other real estate owned | Level I
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Other real estate owned | Level II
Fair Value Measurements [Abstract]
Total assets, fair value	0	0
Other real estate owned | Level III
Fair Value Measurements [Abstract]
Total assets, fair value	$ 376	$ 413