Fair Value Measurements - Net Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	$ (88)	$ (18)	$ (1,110)	$ (38)
SBA property
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	(9)	0	(147)	(20)
Commercial lines of credit
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	(79)	0	(799)	0
SBA commercial term
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	0	0	(164)	0
Other real estate owned
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	$ 0	$ (18)	$ 0	$ (18)