Fair Value of Financial Instruments - Recorded Amount of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) - Non-recurring Fair Value - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 3,909	$ 4,130
Foreclosed assets	5,612	1,094
Equity security investment with a non-readily determinable fair value	8,738
Total assets at fair value	18,259	5,224
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity security investment with a non-readily determinable fair value	8,738
Total assets at fair value	8,738
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,909	4,130
Foreclosed assets	5,612	1,094
Total assets at fair value	$ 9,521	$ 5,224