Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value on a Non-recurring Basis, Fair Value (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Impaired loans	$ 11,614	$ 11,980
Total assets	11,614	11,980
Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Total assets	0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Total assets	0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans	11,614	11,980
Total assets	$ 11,614	$ 11,980