Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value on a Non-recurring Basis, Fair Value (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other real estate owned	$ 0	$ 0	$ 239,000	$ 0
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	11,026,000	11,980,000
Total assets	11,026,000	11,980,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	11,026,000	11,980,000
Total assets	$ 11,026,000	$ 11,980,000