Fair Value - Financial Assets and Liabilities Measured on a Non-Recurring Basis (Details) - Non-recurring basis - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	$ 862	$ 702
Significant Unobservable Inputs (Level 3)
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	862	702
Commercial | Commercial
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	862	702
Commercial | Commercial | Significant Unobservable Inputs (Level 3)
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	$ 862	$ 702